/*
(C) Copyright MarketLive. 2006. All rights reserved.
MarketLive is a trademark of MarketLive, Inc.
Warning: This computer program is protected by copyright law and international treaties.
Unauthorized reproduction or distribution of this program, or any portion of it, may result
in severe civil and criminal penalties, and will be prosecuted to the maximum extent
possible under the law.
*/

	/* As per learning Resource requirement, function to highlight customer review tab on click of Customer Review Button on Detail Page. */

var varLnk1="";
	function highlightCustomerReviewTab(customerReviewrTabId) {
           setActiveTab(customerReviewrTabId)
	}

	/**
	 * Sets the current tab to its on state and other other tabs to their off states,
	 * it also displays the tabs associated content. 
	 * @param {String} sTabID This is the string ID of the active tab.
	 */
    function setActiveTab(sTabID, sTabName){
		/** A DOM ref to the tab content block element. */
		var oTabContent = document.getElementById("tabContent");
		/** A DOM ref to the tab's assocated content. */
		var oNewContent = document.getElementById(sTabID+"_content");
		/** A DOM ref to the active tab. */
		var oTab = document.getElementById(sTabID);

		var tabOnClassElement = document.getElementsByClassName("infoTabOn");
		if(tabOnClassElement != undefined && tabOnClassElement.length > 0)
		{
			for(var i=0; i < tabOnClassElement.length; i++){
				var tabObject = tabOnClassElement[i];
				tabObject.className="infoTabOff";
			}
		}

		
    // set the current tab state to On and the others to Off
    // works for both text and img tabs
    for(var i=0; i<oTab.parentNode.childNodes.length; i++){
        var tempNode = oTab.parentNode.childNodes[i];
        if (tempNode.id && tempNode.id.indexOf("tab_") != -1){
            var oImg = getTabImg(tempNode.id, tempNode);
            if (tempNode.id == sTabID){
                tempNode.className="infoTabOn";
                if (oImg) oImg.src = eval(oImg.id+"_ON.src");
            } else {
                tempNode.className="infoTabOff";
                if (oImg) oImg.src = eval(oImg.id+"_OFF.src");
            }
        }
    }

        tabTracking(sTabID, sTabName);
  
		// display the content associated with the active tab
		// first hide current child noce and move it back 
		if( oTabContent.childNodes[0]) {
			oTabContent.childNodes[0].style.display="none";
			oNewContent.parentNode.appendChild(oTabContent.childNodes[0]);
		}
		// next append new content node to tab content and unhide
		oTabContent.appendChild( oNewContent );
		oNewContent.style.display="block";
	
	}

	function setSingleTab(){
		//New code added to handle the IE compatibility as the full.js is not IE compatible i.e. does not shows us "write a review" link in IE
		if (navigator.userAgent.indexOf('MSIE') !=-1)
		{
			
		var getLnk = getLnkObj("prSnippetLink", "a");
		showForcedContent("prSummaryWriteReviewId_NR", "writeReview", getLnk);
		showForcedContent("prSummaryWriteReviewId_R", "writeReview", getLnk);
		}
	}

	function showForcedContent(divObj, lnk, lnkvalue) /* function created to handle 'write a review' missing link in IE for PWR within Customer Reviews tab*/
	{
		if (document.getElementById(divObj))
		{
			document.getElementById(divObj).style.display="block";
			document.getElementById(lnk).href=lnkvalue;
		}

	}
	
	function getLnkObj(clsname, tgname)
	{
		var myArr= new Array();
		var myArr = document.getElementsByTagName(tgname);
		for (i=0;i<myArr.length ;i++ )
		{
			if (myArr[i].className==clsname)
			{
				varLnk1 = myArr[i].href;
				return varLnk1;
			}
		}
	}
					
	/**
	 * Gets a DOM image object ref for the active tab if one exists.  
	 * @param {String} sTabID This is the string ID of the active tab.
	 * @param {Object} oTab This is a DOM ref to the active tab.
	 * @return A DOM image object ref or null if one could not be found.
	 * @type Object 
	 */
	function getTabImg(sTabID, oTab){
		/** An image object. */
		var oImage = null;

		// Loop through the tab's child nodes checking for an image that matches the active tab's ID.
		for (var i=0; i<oTab.childNodes.length; i++){
			var oTempNode = oTab.childNodes[i];
			if (oTempNode.tagName == "IMG" && oTempNode.id && oTempNode.id == sTabID +"_IMG"){
				oImage = oTempNode;
			}
		}

		return oImage;
	}

	/**
	 * Creates an image object with a give source string.  
	 * @param {String} sImgSrc This is the string to be used as the image's srouce.
	 * @return An image object.
	 * @type Object 
	 */
	function createImg(sImgSrc){
		/** A new image object. */
		var newImg = new Image();

		// update the image's source.
		newImg.src = sImgSrc;

		return newImg;
	}

	/**
	 * Passes along tab view/click data to reporting function(s) if they exist.
	 * @param {String} sTabID This is the string ID of the active tab.
	 * @param {String} sTabName This is the name of the active tab.
	 */
	function tabTracking(sTabID, sTabName){
		// only make the call to report the tab view if reportTabViewToOmniture exists
		// (reportTabViewToOmniture exists only if omniture is enabled)
		if (typeof(reportTabViewToOmniture) != "undefined") reportTabViewToOmniture(sTabID, sTabName);
	}