var voted=false;
function vote_item(sid,tid,itemid)
{
	//var obj=eval(document.getElementById("pk_item_"+itemid));
	//var initText=obj.innerHTML;
	var ajaxVote=new AJAXRequest();
	ajaxVote.url=domain+"/vote/vote_item.php?sid="+sid+"&tid="+tid+"&itemid="+itemid;
	ajaxVote.method="POST";
	var message=Array("服务器繁忙，稍后再试!","投票主题不存在!","您已投过票!","投票失败!","投票成功,感谢您的支持!");
	ajaxVote.callback=function(xmlobj)
	{
			var str=xmlobj.responseText;
			if(str=="undefined"||str==null)str=0;
			index=parseInt(str);
			alert(message[index]);
			ajaxVote=null;
	}
	ajaxVote.send();
}