代码如下
//创建XMLHttpRequest对象
var xmlHttp=null;
function creatXMLHttp(){
try{
xmlHttp = new XMLHttpRequest();
}catche(e){
var msxmlhttp = new Array("Msxml2.XMLHTTP.6.0","Msxml2.XMLHTTP.5.0","Msxml2.XMLHTTP.4.0",
"Microsoft.XMLHTTP")
for(var i =0;i < msxmlhttp.length();i++){
try{
xmlHttp = new ActiveXObject(msxmlhttp.[i]) ;
if(xmlHttp!=null){break;}
}catch(e){}
}
}
if(xmlHttp==null){alert("浏览器不支持Ajax")；}
}
function sendRequest(url,params,method,handler){
xmlHttp.onreadystatechange="handler";//指定处理函数
if(mehod=="GET"){
xmlHttp.open(method,url+'?'+params ,true)
xmlHttp.send(null);
}
if(method="POST"){
xmlHttp.open(mehod,url,true) ;
xmlHttp.setRequestHeader("Content-type","application/x-www-form-urlencoded")
xmlHttp.send(params);
}
}
//
function formCheck(){
var url ="logcheck";
var userName=document.getElementById("luserName").value;
var psd=document.getElementById("lpsd").value;
var yanzheng=document.getElementById("lyanzheng").value;
var params="userName="+userName+"&psd="+psd+"&yanzheng="+yanzheng;
sendRequest(url,params,'POST',showResult);
}
function showResult(){
if(xmlHttp.readyState==4&&xmlHttp.status==200){
var info =xmlHttp.responseText;
if(!(info==1)){
alert(info);
}
else{
window.location.href="/studentlogin/admin/home.jsp";
}
}