function QQupdate() {
	var code = trim($('QQ').value);
	var uri = "QQupdate_code.php?QQ="+code;
	var a = createXMLHttpRequest();
	var patn = /^\d+(\.\d+)?$/;
	if(code == ""){
		$('reQQ').innerHTML = "<img src=\"/images/img/no.gif\" align=\"absmiddle\"> 请输入您的QQ号码！";
		$('QQ').focus();
		return false;
	}
	else{
		if(!patn.test(code))
		{
			$('QQ').value="";
			$('reQQ').innerHTML = "<img src=\"/images/img/no.gif\" align=\"absmiddle\"> 错误！QQ格式不正确！只能输入数字！";
			$('QQ').focus();
			return false;
		}
		else{
			$('reQQ').innerHTML = "<img src=\"/images/dialog/loading.gif\" align=\"absmiddle\"> 验证中...";
		}
	}
	a.open("GET", uri, true);
	a.setRequestHeader("Content-Type","application/x-www-form-urlencoded");	
	a.onreadystatechange = function() {
		if (a.readyState == 4 && a.status == 200) {
			if(a.responseText == '1')
			{
				$('upQQ').submit();
				$('subbut').disabled="true";
				return true;
			}
			else
			{
				$('QQ').value="";
				$('reQQ').innerHTML = "<img src=\"/images/img/no.gif\" align=\"absmiddle\"> QQ号码[<span class=\"C_06f F18 F_weight\">"+code+"</span>]升级失败！此号码已存在！";
				$('QQ').focus();
				return false;
			}
		}
	}
	a.send(uri);
	return false;
}