function vote(id){
	var msg;
	var req;
	var url="../../vote.php?action=vote&id="+id+"&s="+Math.round(Math.random()*100);

	if (window.XMLHttpRequest) { // Non-IE browsers
		req = new XMLHttpRequest();
		try {
			req.open("GET", url, false);
		} catch (e) {
			alert(e);
		}
		req.send(null);
	} else if (window.ActiveXObject) { // IE
		req = new ActiveXObject("Microsoft.XMLHTTP");
		if (req) {
			req.open("GET", url, false);
			req.send();
		}
	}
	if (req.readyState == 4) { 
		if (req.status == 200) { 
			if (req.responseText == 0) {
				msg = "您已为该作品投过票!";
			} else {
				msg = "投票成功！该作品得票数" + req.responseText + ",谢谢您的投票!";
			}
		}
	} else {
		msg = "暂时不能进行投票";
	}
	alert(msg);
}