PHP Jquery.ajax No Refresh login Simple instance Code

A very simple application example, the use of Jquery.ajax to achieve no refresh login effect, convenient very simple, the example also only said the jquery application of this masonry, PHP tutorial that paragraph did not say, there is a need for friends can refer to.

<script src= "Js/jquery-1.4.2.js" type= "text/Web Effects" ></script>
<script language= "JavaScript" >
function Test () {
$.ajax ({
Type: "Post",
URL: "ap.asp tutorial X",
Data: "username=123&password=456",
Success:function (data) {
if (data = = "true") {
Alert ("Landing success!") ");
}
else {
Alert ("Landing failed");
}
}
});
}
function Btntestajax_onclick () {
Test ();
}
</script>

HTML code

<form id= "Form1" runat= "Server" >
<div>
<input id= "Btntestajax" type= "button" value= "Test Asynchronous Refresh" onclick= "return Btntestajax_onclick ()"/></div>
</form>

ap.php file

?
echo true;
?>