function nload()
        {	
	 var xmlDocClass;
        if (window.ActiveXObject) 
        { 
            xmlDocClass= new ActiveXObject("Microsoft.XMLDOM");
        } 
        // code for Mozilla, Firefox, Opera, etc. 
        else if (window.XMLHttpRequest) 
        { 
            xmlDocClass=document.implementation.createDocument("","",null); 
        } 


        xmlDocClass.async=false; 
        xmlDocClass.load("../productClassEN.xml");
	        var productClass=xmlDocClass.documentElement.childNodes;  //获取所有table节点
	        for(var i=0;i<productClass.length; i++)
            {
                var cls = productClass.item(i);
                if(cls.nodeName.toLowerCase() == "table")
                {
                    var childProductClass = cls.childNodes;
                    var productClassID    = childProductClass.item(0).text;
                    var productClassName  = childProductClass.item(1).text;
                    var productClassGrade = childProductClass.item(2).text;
                    var productClassSupID = childProductClass.item(3).text;
                    
                    if(productClassGrade == 1)
                        addChildClass2(productClass,productClassName,productClassID,productClassGrade);   //添加一级项
                }
            }
        }
        
        function addChildClass2(productClass,text,value,index)
        {
            var tag = text;
            for(var i=1; i<index; i++)
            {
                tag='&nbsp;&nbsp;'+tag;
            }
            var div = document.getElementById("d");
		if (text.length>0){
            if(index  ==1 )
		{
			  div.innerHTML+="<table width='100%' border='0' cellpadding='0' cellspacing='0'><tr><td width='16%' class='customCatalogPrefixTagTDStyle'><img src='../images/an1.jpg' width='11' height='10'></td><td width='84%'  class='customCatalogContentTDStyle'><a href='product.html?id="+value+"' target='_parent'>"+tag+"</a></td></tr></table>";  
		}else
		{
		  div.innerHTML+="<table width='100%' border='0' cellpadding='0' cellspacing='0'><tr><td width='16%' class='customCatalogPrefixTagTDStyle'></td><td width='84%'  class='customCatalogContentTDStyle'><a href='product.html?id="+value+"' target='_parent'>"+tag+"</a></td></tr></table>";  
		}
	}
      		 for( var j=0;j<productClass.length;j++)
            {
                var cls = productClass.item(j);
                if(cls.nodeName.toLowerCase() == "table")
                {
                    var childProductClass = productClass.item(j).childNodes;
                    var productClassSupID = childProductClass.item(3).text;
                    if(productClassSupID == value)
                    {
                        var productClassID    = childProductClass.item(0).text;
                        var productClassName  = childProductClass.item(1).text;
                        var productClassGrade = childProductClass.item(2).text;
                    
                        addChildClass2(productClass,productClassName,productClassID,productClassGrade);
                    }
                }
            }
        }