var state=-2;
function checkUser() {
var username = document.getElementById("username").value;
var userpass = document.getElementById("userpass").value;
serverValidate(username,userpass);
/*
*在这里如何取state的状态?????
*如何判断responseCheck方法执行结束?
*
*/
return false;
}
function serverValidate(username,userpass){
var fulURL=url+'&username='+username+'&userpass='+userpass;
startRequest(fulURL,responseCheck);
}
function responseCheck()
{
if (xmlHttp.readyState == 4) {
if (xmlHttp.status == 200) {
state= xmlHttp.responseText;
}
}
}