Ajax User Login function

Today speaking of Ajax to achieve static file landing effect it, first of all, we take the station www.111cn.net landing effect as an example: First look at the Www.111cn.net landing entrance effect:
This seems to be no different from the other, but we carefully look at the original this is a static page of the entrance, the successful landing in this static page to show the effect is that this is the landing of a successful choice to enter the column,

Our main point is to look at this picture, this is the success of the display in the index.html landing, but I would like to affirm that it is not done with the framework, but it is implemented in Ajax, the following we look at its HTML source code we will send in the end of the file has such a piece of coding:
<script language= "JavaScript" >
<!--
function Return_member (str) {
var url= ';
Ajaxcreate ();
if (str==0) {
Url= "/member.php?action=" +math.random ();
}else{
Url= "/user_login.php?pp=" +math.random ();
}
Xmlhttp.open ("Get", url,true);
Xmlhttp.send (NULL);
if (str==0) {
Xmlhttp.onreadystatechange=returnstate;
}else{
Xmlhttp.onreadystatechange=update_login;
}
}

function Returnstate () {
if (xmlhttp.readystate!= 4) {
document.getElementById ("Ajax"). Innerhtml= "Loading data, please later ...";
}
if (xmlhttp.readystate = = 4) {
document.getElementById ("Ajax"). Innerhtml=xmlhttp.responsetext;
}
}
function Update_login () {
if (xmlhttp.readystate = = 4) {
document.getElementById ("Pper"). Innerhtml=xmlhttp.responsetext;
}
}
function Loader () {
Return_member ();
}
-->
</script>
This code url= "/user_login.php?pp=" +math.random (); This is to send the data to the user_login.php file for processing, in fact, PHP files and our normal landing method is no different.

Note: Original works reproduced please specify: www.111cn.net