var ReviewEditorManager = Class.create();

ReviewEditorManager.InitializeNewReviewEditor = function(divId, elementId, productId, defaultCollapsedText,
                                                    defaultUncollapsedText, redirectLink, redirectCounter)
{
    if (!document.getElementById(elementId))
    {
        var collapsedReviewArea = Builder.node('p', {id: elementId}, defaultCollapsedText);
        collapsedReviewArea.productId = productId;
        collapsedReviewArea.defaultCollapsedText = defaultCollapsedText;
        collapsedReviewArea.defaultUncollapsedText = defaultUncollapsedText;
        collapsedReviewArea.redirectLink = redirectLink;
        collapsedReviewArea.redirectCounter = redirectCounter;

        var div = document.getElementById(divId);
        div.appendChild(collapsedReviewArea);

        ReviewEditorManager.CreateErrorMessageArea(collapsedReviewArea);

        ReviewEditorManager.InitializeInPlaceEditor(elementId, productId, '', ReviewEditorManager.HandleServerResponseForNewReviews, true);
    }
};

///<summary>
///Initializes review editor using the element, containing the text to be edited.
///Caution: this function does not encode the text and does not replace '\n' with <br/>. You should do it manually!
///</summary>
ReviewEditorManager.InitializeExistingReviewEditor = function(elementId, productId, reviewId)
{
    var collapsedReviewArea = document.getElementById(elementId);

    ReviewEditorManager.CreateErrorMessageArea(collapsedReviewArea);

    ReviewEditorManager.InitializeInPlaceEditor(elementId, productId, reviewId, 
    ReviewEditorManager.HandleServerResponseForExistingReviews, false);
};

ReviewEditorManager.CreateErrorMessageArea = function(collapsedReviewArea)
{
    var errorMessageArea = Builder.node('p', {className: "review-error-text"}, " ");
    errorMessageArea.style.display = "none";
    
    collapsedReviewArea.parentNode.insertBefore(errorMessageArea, collapsedReviewArea);
    collapsedReviewArea.errorMessageArea = errorMessageArea;
};
 
ReviewEditorManager.InitializeInPlaceEditor = function (elementId, productId, reviewId, onCompleteFunction, isReviewNew)
{
    var element = document.getElementById(elementId);
    element.className = element.className + ' review-text-active';
    
    options = 
    {
        okText: 'Save',
        cancelText: 'Cancel',
        highlightcolor: '#E0E0E0',
        highlightendcolor: '#EAEAEA',
        rows:'15',
        cols:'66',
        savingText: 'Saving…',
        onComplete: onCompleteFunction,
        callback: function(form, value) 
        {
            return 'RequestForEdit=true&ReviewText=' + escape(value) + '&ProductID=' + productId + '&ReviewID=' + reviewId;
        }
    }

    if(isReviewNew)
    {
        options.onEnterEditMode = ReviewEditorManager.HandleEnterEditModeForNewReviews;
    }
    else
    {
        options.onEnterEditMode = ReviewEditorManager.HandleEnterEditModeForExistingReviews;
        options.loadTextURL = 'EditReview.aspx?RequestForEdit=false&ProductID=' + productId + '&ReviewID=' + reviewId;
    }

    var inPlaceEditor = new Ajax.InPlaceEditor ( elementId, 'EditReview.aspx', options);

};


ReviewEditorManager.HandleEnterEditModeForExistingReviews = function(inPlaceEditor, value)
{
    inPlaceEditor.element.errorMessageArea.style.display = "none";
};

//The next two functions are called from the inPlaceEditor in such a way, that "this" is not the ReviewEditorManager instance,
//but "options" object. Fortuately, inPlaceEditor has an "element" field, 
//which is exactly the one that we need
ReviewEditorManager.HandleEnterEditModeForNewReviews = function(inPlaceEditor, value)
{
    inPlaceEditor.element.errorMessageArea.style.display = "none";

    //This function will be called just for new objects, so we will substitute the inner html.
    inPlaceEditor.element.innerHTML = inPlaceEditor.element.defaultUncollapsedText;
};

//This function is called after data is submitted to the server and after the response comes.
//!!!НО: какая-то ерунда--иногда эта функция вызывается после InitializeCreatedReview, иногда до.
/*ReviewEditorManager.HandleLeaveEditModeForNewReviews = function(inPlaceEditor, value){}*/

//This function is called when a response comes after submitting a new inplace editor or after clicking cancel button
//Here "this" is the calling InPlaceEditor.
ReviewEditorManager.HandleServerResponseForNewReviews = function(transport)
{
    //if cancel button was clicked
    if(transport == null)
    {
        this.element.innerHTML = this.element.defaultCollapsedText;
        return;
    }

    if (this.element.redirectCounter == 0)
    {
        window.location = this.element.redirectLink;
    }

    var reviewHandlerResponse;
    try
    {
        //When a server response comes, the text in the editor is automatically set to the response string.
        reviewHandlerResponse = Sys.Serialization.JavaScriptSerializer.deserialize(this.element.innerHTML);
        this.element.redirectCounter -= 1;
    }
    catch(e)
    {
        this.element.innerHTML = this.element.defaultCollapsedText;
        return;
    }
    
    if(reviewHandlerResponse.ReviewSavedSuccessfully)
    {
        ReviewEditorManager.BuildInPlaceEditorForExistingReview(this.element, reviewHandlerResponse);
    }
    else
    {
        this.element.errorMessageArea.style.display = ""; 
        this.element.errorMessageArea.innerHTML = reviewHandlerResponse.ErrorMessage;
        this.element.innerHTML = this.element.defaultCollapsedText;
    }
};

ReviewEditorManager.BuildInPlaceEditorForExistingReview = function(elementForNewReviews, reviewHandlerResponse)
{
        //we need to decode the text, because the server returns the encoded text, 
        //but it will be encoded once again by the browser while adding the text to the "p" element
        var reviewText = ReviewEditorManager.HtmlDecode(reviewHandlerResponse.Text);
        
        var newDiv = Builder.node('div', [
        Builder.node('div', {className: 'review-author'}, reviewHandlerResponse.Author),
         Builder.node('div', {className: 'review-date'}, reviewHandlerResponse.DateTime),
         Builder.node('ul', {className: 'star-rating star'+reviewHandlerResponse.RankValue}, [
                    Builder.node('li', {className: 'one'}, '1'),
                   Builder.node('li', {className: 'two'}, '2'),
                   Builder.node('li', {className: 'three'}, '3'),
                  Builder.node('li', {className: 'four'}, '4'),
                  Builder.node('li', {className: 'five'}, '5')
          ]),
          Builder.node('div', {className: 'review-text'}, [
                   Builder.node('p', {id: 'Review' + reviewHandlerResponse.ReviewID}, reviewText)])
      ]); 

        var oldDiv = document.getElementById('NewReviewTargetDiv');
        oldDiv.parentNode.insertBefore(newDiv, oldDiv);
        elementForNewReviews.innerHTML = elementForNewReviews.defaultCollapsedText;
        ReviewEditorManager.InitializeExistingReviewEditor('Review'+ reviewHandlerResponse.ReviewID, reviewHandlerResponse.ProductID, 
        reviewHandlerResponse.ReviewID);
};

//This function is called when a response comes after submitting a new inplace editor or after clicking cancel button
//Here "this" is the calling InPlaceEditor.
ReviewEditorManager.HandleServerResponseForExistingReviews = function(transport)
{

    //if cancel button was clicked
    if(transport == null)
    {
        //this.element.innerHTML = ReviewEditorManager.ConvertTextFromEditableToUneditableForm(this.element.innerHTML);
        //display the text that was in the editor
        return;
    }

    var reviewHandlerResponse;
    try
    {
        reviewHandlerResponse = Sys.Serialization.JavaScriptSerializer.deserialize(this.element.innerHTML);
    }
    catch(e)
    {
        this.element.innerHTML = this.element.defaultCollapsedText;
        return;
    }

    //var reviewText = ReviewEditorManager.ConvertTextFromEditableToUneditableForm(reviewHandlerResponse.Text);
    var reviewText = reviewHandlerResponse.Text;

    if(!reviewHandlerResponse.ReviewSavedSuccessfully)
    {
        this.element.errorMessageArea.style.display = "";
        this.element.errorMessageArea.innerHTML = reviewHandlerResponse.ErrorMessage;
        this.element.innerHTML = reviewText;
    }
    else
    {
        this.element.innerHTML = reviewText;
    }
};


ReviewEditorManager.ConvertTextFromEditableToUneditableForm = function(str)
{
    var result = ReviewEditorManager.HtmlEncode(str);
    result = ReviewEditorManager.ReplaceNewlineWithBr(result);
    return result;
};


ReviewEditorManager.ConvertTextFromUneditableToEditableForm = function(str)
{
    var result = ReviewEditorManager.ReplaceBrWithNewline(str);
    result = ReviewEditorManager.HtmlDecode(result);
    return result;
};


ReviewEditorManager.ReplaceNewlineWithBr = function(s)
{
    return s.replace(/\n/g,'<br/>');
};

ReviewEditorManager.ReplaceBrWithNewline = function(s)
{
    return s.replace(/<br\/>/g, '\n');
};

// client side version of the Server.HtmlEncode method
ReviewEditorManager.HtmlEncode = function(str)
{
   var div = document.createElement('div');
   var text = document.createTextNode(str);
   div.appendChild(text);
   return div.innerHTML;
};

//Andy Oakley
//   HtmlDecode http://lab.msdn.microsoft.com/annotations/htmldecode.js
//   client side version of the useful Server.HtmlDecode method
//   takes one string (encoded) and returns another (decoded)
ReviewEditorManager.HtmlDecode = function(s)
{
      var out = "";
      if (s==null) return;
      var l = s.length;
      for (var i=0; i<l; i++)
      {
            var ch = s.charAt(i);
           
            if (ch == '&')
            {
                  var semicolonIndex = s.indexOf(';', i+1);
                 
            if (semicolonIndex > 0)
            {
                        var entity = s.substring(i + 1, semicolonIndex);
                        if (entity.length > 1 && entity.charAt(0) == '#')
                        {
                              if (entity.charAt(1) == 'x' || entity.charAt(1) == 'X')
                                    ch = String.fromCharCode(eval('0'+entity.substring(1)));
                              else
                                    ch = String.fromCharCode(eval(entity.substring(1)));
                        }
                    else
                      {
                              switch (entity)
                              {
                                    case 'quot': ch = String.fromCharCode(0x0022); break;
                                    case 'amp': ch = String.fromCharCode(0x0026); break;
                                    case 'lt': ch = String.fromCharCode(0x003c); break;
                                    case 'gt': ch = String.fromCharCode(0x003e); break;
                                    case 'nbsp': ch = String.fromCharCode(0x00a0); break;
                                    case 'iexcl': ch = String.fromCharCode(0x00a1); break;
                                    case 'cent': ch = String.fromCharCode(0x00a2); break;
                                    case 'pound': ch = String.fromCharCode(0x00a3); break;
                                    case 'curren': ch = String.fromCharCode(0x00a4); break;
                                    case 'yen': ch = String.fromCharCode(0x00a5); break;
                                    case 'brvbar': ch = String.fromCharCode(0x00a6); break;
                                    case 'sect': ch = String.fromCharCode(0x00a7); break;
                                    case 'uml': ch = String.fromCharCode(0x00a8); break;
                                    case 'copy': ch = String.fromCharCode(0x00a9); break;
                                    case 'ordf': ch = String.fromCharCode(0x00aa); break;
                                    case 'laquo': ch = String.fromCharCode(0x00ab); break;
                                    case 'not': ch = String.fromCharCode(0x00ac); break;
                                    case 'shy': ch = String.fromCharCode(0x00ad); break;
                                    case 'reg': ch = String.fromCharCode(0x00ae); break;
                                    case 'macr': ch = String.fromCharCode(0x00af); break;
                                    case 'deg': ch = String.fromCharCode(0x00b0); break;
                                    case 'plusmn': ch = String.fromCharCode(0x00b1); break;
                                    case 'sup2': ch = String.fromCharCode(0x00b2); break;
                                    case 'sup3': ch = String.fromCharCode(0x00b3); break;
                                    case 'acute': ch = String.fromCharCode(0x00b4); break;
                                    case 'micro': ch = String.fromCharCode(0x00b5); break;
                                    case 'para': ch = String.fromCharCode(0x00b6); break;
                                    case 'middot': ch = String.fromCharCode(0x00b7); break;
                                    case 'cedil': ch = String.fromCharCode(0x00b8); break;
                                    case 'sup1': ch = String.fromCharCode(0x00b9); break;
                                    case 'ordm': ch = String.fromCharCode(0x00ba); break;
                                    case 'raquo': ch = String.fromCharCode(0x00bb); break;
                                    case 'frac14': ch = String.fromCharCode(0x00bc); break;
                                    case 'frac12': ch = String.fromCharCode(0x00bd); break;
                                    case 'frac34': ch = String.fromCharCode(0x00be); break;
                                    case 'iquest': ch = String.fromCharCode(0x00bf); break;
                                    case 'Agrave': ch = String.fromCharCode(0x00c0); break;
                                    case 'Aacute': ch = String.fromCharCode(0x00c1); break;
                                    case 'Acirc': ch = String.fromCharCode(0x00c2); break;
                                    case 'Atilde': ch = String.fromCharCode(0x00c3); break;
                                    case 'Auml': ch = String.fromCharCode(0x00c4); break;
                                    case 'Aring': ch = String.fromCharCode(0x00c5); break;
                                    case 'AElig': ch = String.fromCharCode(0x00c6); break;
                                    case 'Ccedil': ch = String.fromCharCode(0x00c7); break;
                                    case 'Egrave': ch = String.fromCharCode(0x00c8); break;
                                    case 'Eacute': ch = String.fromCharCode(0x00c9); break;
                                    case 'Ecirc': ch = String.fromCharCode(0x00ca); break;
                                    case 'Euml': ch = String.fromCharCode(0x00cb); break;
                                    case 'Igrave': ch = String.fromCharCode(0x00cc); break;
                                    case 'Iacute': ch = String.fromCharCode(0x00cd); break;
                                    case 'Icirc': ch = String.fromCharCode(0x00ce ); break;
                                    case 'Iuml': ch = String.fromCharCode(0x00cf); break;
                                    case 'ETH': ch = String.fromCharCode(0x00d0); break;
                                    case 'Ntilde': ch = String.fromCharCode(0x00d1); break;
                                    case 'Ograve': ch = String.fromCharCode(0x00d2); break;
                                    case 'Oacute': ch = String.fromCharCode(0x00d3); break;
                                    case 'Ocirc': ch = String.fromCharCode(0x00d4); break;
                                    case 'Otilde': ch = String.fromCharCode(0x00d5); break;
                                    case 'Ouml': ch = String.fromCharCode(0x00d6); break;
                                    case 'times': ch = String.fromCharCode(0x00d7); break;
                                    case 'Oslash': ch = String.fromCharCode(0x00d8); break;
                                    case 'Ugrave': ch = String.fromCharCode(0x00d9); break;
                                    case 'Uacute': ch = String.fromCharCode(0x00da); break;
                                    case 'Ucirc': ch = String.fromCharCode(0x00db); break;
                                    case 'Uuml': ch = String.fromCharCode(0x00dc); break;
                                    case 'Yacute': ch = String.fromCharCode(0x00dd); break;
                                    case 'THORN': ch = String.fromCharCode(0x00de); break;
                                    case 'szlig': ch = String.fromCharCode(0x00df); break;
                                    case 'agrave': ch = String.fromCharCode(0x00e0); break;
                                    case 'aacute': ch = String.fromCharCode(0x00e1); break;
                                    case 'acirc': ch = String.fromCharCode(0x00e2); break;
                                    case 'atilde': ch = String.fromCharCode(0x00e3); break;
                                    case 'auml': ch = String.fromCharCode(0x00e4); break;
                                    case 'aring': ch = String.fromCharCode(0x00e5); break;
                                    case 'aelig': ch = String.fromCharCode(0x00e6); break;
                                    case 'ccedil': ch = String.fromCharCode(0x00e7); break;
                                    case 'egrave': ch = String.fromCharCode(0x00e8); break;
                                    case 'eacute': ch = String.fromCharCode(0x00e9); break;
                                    case 'ecirc': ch = String.fromCharCode(0x00ea); break;
                                    case 'euml': ch = String.fromCharCode(0x00eb); break;
                                    case 'igrave': ch = String.fromCharCode(0x00ec); break;
                                    case 'iacute': ch = String.fromCharCode(0x00ed); break;
                                    case 'icirc': ch = String.fromCharCode(0x00ee); break;
                                    case 'iuml': ch = String.fromCharCode(0x00ef); break;
                                    case 'eth': ch = String.fromCharCode(0x00f0); break;
                                    case 'ntilde': ch = String.fromCharCode(0x00f1); break;
                                    case 'ograve': ch = String.fromCharCode(0x00f2); break;
                                    case 'oacute': ch = String.fromCharCode(0x00f3); break;
                                    case 'ocirc': ch = String.fromCharCode(0x00f4); break;
                                    case 'otilde': ch = String.fromCharCode(0x00f5); break;
                                    case 'ouml': ch = String.fromCharCode(0x00f6); break;
                                    case 'divide': ch = String.fromCharCode(0x00f7); break;
                                    case 'oslash': ch = String.fromCharCode(0x00f8); break;
                                    case 'ugrave': ch = String.fromCharCode(0x00f9); break;
                                    case 'uacute': ch = String.fromCharCode(0x00fa); break;
                                    case 'ucirc': ch = String.fromCharCode(0x00fb); break;
                                    case 'uuml': ch = String.fromCharCode(0x00fc); break;
                                    case 'yacute': ch = String.fromCharCode(0x00fd); break;
                                    case 'thorn': ch = String.fromCharCode(0x00fe); break;
                                    case 'yuml': ch = String.fromCharCode(0x00ff); break;
                                    case 'OElig': ch = String.fromCharCode(0x0152); break;
                                    case 'oelig': ch = String.fromCharCode(0x0153); break;
                                    case 'Scaron': ch = String.fromCharCode(0x0160); break;
                                    case 'scaron': ch = String.fromCharCode(0x0161); break;
                                    case 'Yuml': ch = String.fromCharCode(0x0178); break;
                                    case 'fnof': ch = String.fromCharCode(0x0192); break;
                                    case 'circ': ch = String.fromCharCode(0x02c6); break;
                                    case 'tilde': ch = String.fromCharCode(0x02dc); break;
                                    case 'Alpha': ch = String.fromCharCode(0x0391); break;
                                    case 'Beta': ch = String.fromCharCode(0x0392); break;
                                    case 'Gamma': ch = String.fromCharCode(0x0393); break;
                                    case 'Delta': ch = String.fromCharCode(0x0394); break;
                                    case 'Epsilon': ch = String.fromCharCode(0x0395); break;
                                    case 'Zeta': ch = String.fromCharCode(0x0396); break;
                                    case 'Eta': ch = String.fromCharCode(0x0397); break;
                                    case 'Theta': ch = String.fromCharCode(0x0398); break;
                                    case 'Iota': ch = String.fromCharCode(0x0399); break;
                                    case 'Kappa': ch = String.fromCharCode(0x039a); break;
                                    case 'Lambda': ch = String.fromCharCode(0x039b); break;
                                    case 'Mu': ch = String.fromCharCode(0x039c); break;
                                    case 'Nu': ch = String.fromCharCode(0x039d); break;
                                    case 'Xi': ch = String.fromCharCode(0x039e); break;
                                    case 'Omicron': ch = String.fromCharCode(0x039f); break;
                                    case 'Pi': ch = String.fromCharCode(0x03a0); break;
                                    case ' Rho ': ch = String.fromCharCode(0x03a1); break;
                                    case 'Sigma': ch = String.fromCharCode(0x03a3); break;
                                    case 'Tau': ch = String.fromCharCode(0x03a4); break;
                                    case 'Upsilon': ch = String.fromCharCode(0x03a5); break;
                                    case 'Phi': ch = String.fromCharCode(0x03a6); break;
                                    case 'Chi': ch = String.fromCharCode(0x03a7); break;
                                    case 'Psi': ch = String.fromCharCode(0x03a8); break;
                                    case 'Omega': ch = String.fromCharCode(0x03a9); break;
                                    case 'alpha': ch = String.fromCharCode(0x03b1); break;
                                    case 'beta': ch = String.fromCharCode(0x03b2); break;
                                    case 'gamma': ch = String.fromCharCode(0x03b3); break;
                                    case 'delta': ch = String.fromCharCode(0x03b4); break;
                                    case 'epsilon': ch = String.fromCharCode(0x03b5); break;
                                    case 'zeta': ch = String.fromCharCode(0x03b6); break;
                                    case 'eta': ch = String.fromCharCode(0x03b7); break;
                                    case 'theta': ch = String.fromCharCode(0x03b8); break;
                                    case 'iota': ch = String.fromCharCode(0x03b9); break;
                                    case 'kappa': ch = String.fromCharCode(0x03ba); break;
                                    case 'lambda': ch = String.fromCharCode(0x03bb); break;
                                    case 'mu': ch = String.fromCharCode(0x03bc); break;
                                    case 'nu': ch = String.fromCharCode(0x03bd); break;
                                    case 'xi': ch = String.fromCharCode(0x03be); break;
                                    case 'omicron': ch = String.fromCharCode(0x03bf); break;
                                    case 'pi': ch = String.fromCharCode(0x03c0); break;
                                    case 'rho': ch = String.fromCharCode(0x03c1); break;
                                    case 'sigmaf': ch = String.fromCharCode(0x03c2); break;
                                    case 'sigma': ch = String.fromCharCode(0x03c3); break;
                                    case 'tau': ch = String.fromCharCode(0x03c4); break;
                                    case 'upsilon': ch = String.fromCharCode(0x03c5); break;
                                    case 'phi': ch = String.fromCharCode(0x03c6); break;
                                    case 'chi': ch = String.fromCharCode(0x03c7); break;
                                    case 'psi': ch = String.fromCharCode(0x03c8); break;
                                    case 'omega': ch = String.fromCharCode(0x03c9); break;
                                    case 'thetasym': ch = String.fromCharCode(0x03d1); break;
                                    case 'upsih': ch = String.fromCharCode(0x03d2); break;
                                    case 'piv': ch = String.fromCharCode(0x03d6); break;
                                    case 'ensp': ch = String.fromCharCode(0x2002); break;
                                    case 'emsp': ch = String.fromCharCode(0x2003); break;
                                    case 'thinsp': ch = String.fromCharCode(0x2009); break;
                                    case 'zwnj': ch = String.fromCharCode(0x200c); break;
                                    case 'zwj': ch = String.fromCharCode(0x200d); break;
                                    case 'lrm': ch = String.fromCharCode(0x200e); break;
                                    case 'rlm': ch = String.fromCharCode(0x200f); break;
                                    case 'ndash': ch = String.fromCharCode(0x2013); break;
                                    case 'mdash': ch = String.fromCharCode(0x2014); break;
                                    case 'lsquo': ch = String.fromCharCode(0x2018); break;
                                    case 'rsquo': ch = String.fromCharCode(0x2019); break;
                                    case 'sbquo': ch = String.fromCharCode(0x201a); break;
                                    case 'ldquo': ch = String.fromCharCode(0x201c); break;
                                    case 'rdquo': ch = String.fromCharCode(0x201d); break;
                                    case 'bdquo': ch = String.fromCharCode(0x201e); break;
                                    case 'dagger': ch = String.fromCharCode(0x2020); break;
                                    case 'Dagger': ch = String.fromCharCode(0x2021); break;
                                    case 'bull': ch = String.fromCharCode(0x2022); break;
                                    case 'hellip': ch = String.fromCharCode(0x2026); break;
                                    case 'permil': ch = String.fromCharCode(0x2030); break;
                                    case 'prime': ch = String.fromCharCode(0x2032); break;
                                    case 'Prime': ch = String.fromCharCode(0x2033); break;
                                    case 'lsaquo': ch = String.fromCharCode(0x2039); break;
                                    case 'rsaquo': ch = String.fromCharCode(0x203a); break;
                                    case 'oline': ch = String.fromCharCode(0x203e); break;
                                    case 'frasl': ch = String.fromCharCode(0x2044); break;
                                    case 'euro': ch = String.fromCharCode(0x20ac); break;
                                    case 'image': ch = String.fromCharCode(0x2111); break;
                                    case 'weierp': ch = String.fromCharCode(0x2118); break;
                                    case 'real': ch = String.fromCharCode(0x211c); break;
                                    case 'trade': ch = String.fromCharCode(0x2122); break;
                                    case 'alefsym': ch = String.fromCharCode(0x2135); break;
                                    case 'larr': ch = String.fromCharCode(0x2190); break;
                                    case 'uarr': ch = String.fromCharCode(0x2191); break;
                                    case 'rarr': ch = String.fromCharCode(0x2192); break;
                                    case 'darr': ch = String.fromCharCode(0x2193); break;
                                    case 'harr': ch = String.fromCharCode(0x2194); break;
                                    case 'crarr': ch = String.fromCharCode(0x21b5); break;
                                    case 'lArr': ch = String.fromCharCode(0x21d0); break;
                                    case 'uArr': ch = String.fromCharCode(0x21d1); break;
                                    case 'rArr': ch = String.fromCharCode(0x21d2); break;
                                    case 'dArr': ch = String.fromCharCode(0x21d3); break;
                                    case 'hArr': ch = String.fromCharCode(0x21d4); break;
                                    case 'forall': ch = String.fromCharCode(0x2200); break;
                                    case 'part': ch = String.fromCharCode(0x2202); break;
                                    case 'exist': ch = String.fromCharCode(0x2203); break;
                                    case 'empty': ch = String.fromCharCode(0x2205); break;
                                    case 'nabla': ch = String.fromCharCode(0x2207); break;
                                    case 'isin': ch = String.fromCharCode(0x2208); break;
                                    case 'notin': ch = String.fromCharCode(0x2209); break;
                                    case 'ni': ch = String.fromCharCode(0x220b); break;
                                    case 'prod': ch = String.fromCharCode(0x220f); break;
                                    case 'sum': ch = String.fromCharCode(0x2211); break;
                                    case 'minus': ch = String.fromCharCode(0x2212); break;
                                    case 'lowast': ch = String.fromCharCode(0x2217); break;
                                    case 'radic': ch = String.fromCharCode(0x221a); break;
                                    case 'prop': ch = String.fromCharCode(0x221d); break;
                                    case 'infin': ch = String.fromCharCode(0x221e); break;
                                    case 'ang': ch = String.fromCharCode(0x2220); break;
                                    case 'and': ch = String.fromCharCode(0x2227); break;
                                    case 'or': ch = String.fromCharCode(0x2228); break;
                                    case 'cap': ch = String.fromCharCode(0x2229); break;
                                    case 'cup': ch = String.fromCharCode(0x222a); break;
                                    case 'int': ch = String.fromCharCode(0x222b); break;
                                    case 'there4': ch = String.fromCharCode(0x2234); break;
                                    case 'sim': ch = String.fromCharCode(0x223c); break;
                                    case 'cong': ch = String.fromCharCode(0x2245); break;
                                    case 'asymp': ch = String.fromCharCode(0x2248); break;
                                    case 'ne': ch = String.fromCharCode(0x2260); break;
                                    case 'equiv': ch = String.fromCharCode(0x2261); break;
                                    case 'le': ch = String.fromCharCode(0x2264); break;
                                    case 'ge': ch = String.fromCharCode(0x2265); break;
                                    case 'sub': ch = String.fromCharCode(0x2282); break;
                                    case 'sup': ch = String.fromCharCode(0x2283); break;
                                    case 'nsub': ch = String.fromCharCode(0x2284); break;
                                    case 'sube': ch = String.fromCharCode(0x2286); break;
                                    case 'supe': ch = String.fromCharCode(0x2287); break;
                                    case 'oplus': ch = String.fromCharCode(0x2295); break;
                                    case 'otimes': ch = String.fromCharCode(0x2297); break;
                                    case 'perp': ch = String.fromCharCode(0x22a5); break;
                                    case 'sdot': ch = String.fromCharCode(0x22c5); break;
                                    case 'lceil': ch = String.fromCharCode(0x2308); break;
                                    case 'rceil': ch = String.fromCharCode(0x2309); break;
                                    case 'lfloor': ch = String.fromCharCode(0x230a); break;
                                    case 'rfloor': ch = String.fromCharCode(0x230b); break;
                                    case 'lang': ch = String.fromCharCode(0x2329); break;
                                    case 'rang': ch = String.fromCharCode(0x232a); break;
                                    case 'loz': ch = String.fromCharCode(0x25ca); break;
                                    case 'spades': ch = String.fromCharCode(0x2660); break;
                                    case 'clubs': ch = String.fromCharCode(0x2663); break;
                                    case 'hearts': ch = String.fromCharCode(0x2665); break;
                                    case 'diams': ch = String.fromCharCode(0x2666); break;
                                    default: ch = ''; break;
                              }
                        }
                        i = semicolonIndex;
                  }
            }
            out += ch;
      }
      return out;
};