var Tags=document.getElementById('des_pro_tagmain').getElementsByTagName('li'); 
var iSum= document.getElementById('des_pro_tagmain').getElementsByTagName('li').length;

for (i=0;i<iSum;i++)
{
    Tags[i].value = i;
	Tags[i].onclick=function(){changeNav(this.value)}; 
}

function changeNav(idVal){
    var i = 0;
    for (i=0;i<iSum;i++)
    {
        document.getElementById("des_pro_tagbody" + i).style.backgroundImage="url()";
        document.getElementById("des_pro_tagcon" + i).style.display="none";
    }
    
    if (idVal==0)
    {
        document.getElementById("des_pro_tagbody0").style.backgroundImage="url(/chinatravelNet/images/des_pro_tag.jpg)";
        document.getElementById("des_pro_tagcon0").style.display="";
    }
    else
    {
        document.getElementById("des_pro_tagbody" + idVal).style.backgroundImage="url(/chinatravelNet/images/des_pro_tag1.jpg)";
        document.getElementById("des_pro_tagcon" + idVal).style.display="";
    }
    
    var scroller  = null;
    var scrollbar = null;
    scroller  = new jsScroller(document.getElementById("Scroller-1"), 400, 200);
    scrollbar = new jsScrollbar (document.getElementById("Scrollbar-Container"), scroller, false);
    
}