var userLogin="false";
function createXMLHttpRequest() {
	var xmlHttp;
	if (window.ActiveXObject) {  // IE浏览器
		try {
			xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
		}catch (e) {
			try {
				xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
			}catch (e) {
			}
		}
	} else {
		if (window.XMLHttpRequest) {	//Mozilla浏览器
			xmlHttp = new XMLHttpRequest();
			if (xmlHttp.overrideMimeType) {
				xmlHttp.overrideMimeType("text/xml");
			}
		}
	}
	return xmlHttp;
}

function login(param1,param2){

	var xmlHttp;
	if(xmlHttp==null)
	{
	 xmlHttp = createXMLHttpRequest();
	}
	xmlHttp.onreadystatechange = function(){
		if(xmlHttp.readyState == 4) {
	        if(xmlHttp.status == 200) {// 信息已经成功返回，开始处理信息
	        	var responseText = xmlHttp.responseText;
	        	//alert("responseText"+responseText);
	        	
	        	if(responseText=="success"){
	        		document.all("loginMsg").innerHTML="";
	        		userLogin="true";
					logF.location.reload();
	        	}
				else if(responseText=="failure"){
					document.all("loginMsg").innerHTML="<font color='red'>密码错误！</font>";
					logF.location.reload();
				}
	        }
	        else {
				document.all("loginMsg").innerHTML="<font color='red'>登录失败！请稍候重试！</font>";
				logF.location.reload();
	        }
	    }
	    else if(xmlHttp.readyState == 3){
	    	document.all("loginMsg").innerHTML="<font color='red'>登录中……</font>";
	    	document.all("news_login").innerHTML="";
	    }	
	};
    xmlHttp.open("GET", "/loginAction.do?loginName="+param1+"&password="+param2+"&ts="+new Date().getTime(), true);
    //xmlHttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
    xmlHttp.send(null);
}