//tell a friend
	function copy(ob){
	 var obj=findObj(ob);
	 if (obj) 
	 {
	  obj.select();
	  js=obj.createTextRange();
	  js.execCommand("Copy");
	  alert("复制成功，您可以粘贴（Ctrl+V）到QQ或MSN上推荐给好友。")
	 }
	}
	function findObj(n, d) { 
	  document.getElementById('txtUrl').value=document.title +"  "+ document.location.href;
	  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
	  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
	  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=findObj(n,d.layers[i].document);
	  if(!x && document.getElementById) x=document.getElementById(n); return x;
	}
	//tell a friend

function ChangeDiv(divId,divName,zDivCount) 
{ 
 for(i=0;i<=zDivCount;i++)
 {
     document.getElementById(divName+i).style.display="none"; 
 }
 document.getElementById(divName+divId).style.display="block"; 
}