// JScript 文件

function init()
{
    changeTab(1,"box_top_left21");
    changeTab1(5,"box_top_left21");
}
function changeTab(id,classname)
{
   document.getElementById("tab1").className="box_top_left2";
   document.getElementById("tab2").className="box_top_left2";
   document.getElementById("tab3").className="box_top_left2";
   document.getElementById("tab4").className="box_top_left2";
   document.getElementById("tab"+id).className=classname;
   changeDiv(id);
}
function changeDiv(id)
{
   document.getElementById("tab_layer1").style.display="none";
   document.getElementById("tab_layer2").style.display="none";
   document.getElementById("tab_layer3").style.display="none";
   document.getElementById("tab_layer4").style.display="none";
   document.getElementById("tab_layer"+id).style.display="block";
}

function changeTab1(id,classname)
{
   document.getElementById("tab5").className="box_top_left2";
   document.getElementById("tab6").className="box_top_left2";
   document.getElementById("tab7").className="box_top_left2";
   document.getElementById("tab8").className="box_top_left2";
   document.getElementById("tab"+id).className=classname;
   changeDiv1(id);
}
function changeDiv1(id)
{
   document.getElementById("tab_layer5").style.display="none";
   document.getElementById("tab_layer6").style.display="none";
   document.getElementById("tab_layer7").style.display="none";
   document.getElementById("tab_layer8").style.display="none";
   document.getElementById("tab_layer"+id).style.display="block";
}


function changeBackImage(id)
{
   document.getElementById("list1").style.backgroundImage="url('')";
   document.getElementById("list2").style.backgroundImage="url('')";
   document.getElementById("list"+id).style.backgroundImage="url(image/QQOnline.jpg)";
}
init();