function loginSubmit(login){
		var user = document.getElementById("userid");
		var pwd = document.getElementById("pwd");
		var gourl = document.getElementById("gourl");
		if(user.value=="")
		{
			alert("用户名不能为空！");
			user.focus();
			return false;
		}
		if(pwd.value=="")
		{
			alert("密码不能为空！");
			pwd.focus();
			return false;
		}
		gourl.value = "http://www.xlzx.cn/eap/";
		login.submit();		
	}
	function createXHR()
{
	var xhr = null;
	if(window.XMLHttpRequest){//IE7, Mozilla ,Firefox 等浏览器内置该对象
     xhr = new XMLHttpRequest();
	}else if(window.ActiveXObject){//IE6、IE5
     try { 
     	xhr = new ActiveXObject("Msxml2.XMLHTTP");
     	} catch (e) {
     	try{
     		xhr = new ActiveXObject("Microsoft.XMLHTTP");
     	 } catch (e) {
     	 		xhr = false;
     	 	 }
			}
	}
return xhr;
}
	function loadXML(method,url,callback)
{
	var xhr = createXHR();
　xhr.open(method,url);
　xhr.setRequestHeader("Content-Type","text/xml");
　xhr.setRequestHeader("Content-Type","GBK");
　xhr.onreadystatechange=function()
　{
		if(xhr.readyState == 4){
       if(xhr.status == 200){
        callback(xhr);
       }
   	}
　}
　xhr.send(null);
}
	function checklogin(xmlDom){
		var tub = document.getElementById("tub");
		if(xmlDom.responseText !=""){
			tub.innerHTML = xmlDom.responseText;
		}
	}
	function check(){
		loadXML("get","/newsite/member/logincheck.php",checklogin);
	}