htmlSearcher

var htmlSearcher = ( function ( ) {
    /**************************************
     * Entry point of the "application"
     **************************************/
    var onloadAttachedFunctions = null;

    var startTagMark = "<!--comment_id=tag_";

    var endTagmark = "<!--end_of_html_tag_holder-->";

    if(typeof window.onload == "function") {
        onloadAttachedFunctions = window.onload;
    }

    window.onload = function() {
      if(onloadAttachedFunctions != null) {
        onloadAttachedFunctions();
      }
      var innerHtmlBodyContent = document.body.innerHTML;
      innerHtmlBodyContent = wrapCommentsAroundHtmlTag("img", innerHtmlBodyContent);
      document.body.innerHTML = innerHtmlBodyContent;
      innerHtmlBodyContent = null;
      onloadAttachedFunctions = null;
    }

    var wrapCommentsAroundHtmlTag = function( htmlTagName, htmlString ) {
        var htmlTagRegExp = new RegExp("<\s*" + htmlTagName + "[^>]+>", "gi");
        var tagCounter = 0;
        return htmlString.replace(htmlTagRegExp,
        function(htmlTagAsString) {
                tagCounter++;
                var replacement = startTagMark + tagCounter + "-->" + htmlTagAsString + endTagmark;
                return  replacement;
        });
    }

    var findEquivalentHtmlNode = function(htmlString) {
        for(var i = 0 ; i < document.body.childNodes.length ; i++)
        {
            var currentNode = document.body.childNodes[i];
            var currentData = typeof currentNode.data != 'undefined' ? currentNode.data : '';
            if (currentData == htmlString) {
                return currentNode.nextSibling;
            }
        }
        return null;
    }

    return {

        getElementAsString : function ( elementId ) {
            var tagBetweenComments = new RegExp(startTagMark + elementId + "-->((?:(?!" + endTagmark + ")(?:.|\s))+)" + endTagmark, "gi");
            if(tagBetweenComments.test(document.body.innerHTML)) {
                return RegExp.$1;
            }
            return null;
        },

        getElementAsObject : function ( elementId ) {
                var arg = "comment_id=tag_"+elementId;
                return findEquivalentHtmlNode(arg);
        }
    }

})( );