// JScript 文件

//收缩与展开
var collapse=new Image();
var expand=new Image();
collapse.src="/images/collapse.jpg";
expand.src="/images/expand.jpg";
function collapse_expand(f)
{
  var img=f.getElementsByTagName("img")[0];
  var objs=f.parentNode.getElementsByTagName("div");
  var obj;
  for(i=0;i<objs.length;i++)
  {
    if(objs[i].className=="content")
    {
       obj=objs[i];
       break;
     }
   }
   if(obj)
   {
     if(obj.style.display=="none")
     {
        obj.style.display="";
        img.src=collapse.src;
        img.setAttribute("alt","收缩");
        f.setAttribute("title","收缩");
      }
     else
     {
        obj.style.display="none";
        img.src=expand.src;
        img.setAttribute("alt","展开");
        f.setAttribute("title","展开");
      }
   }
}