Symlink With Wildcard Subdomains

I'm trying to create a symlink (ln -s) in SSH with the goal of having a php-file to be able to be reached from my wildcard subdomains "username.domain.com". The reason is because of XMLHttpRequest that resides in the php-file. When trying to access it from username.domain.com I only get an error, because of the cross-domain issue.

Anyway, I got the suggestion of creating a symlink on the file system, but I can't really get the symlink right... Where should I place it on the file system?

This is the path to the script;

Code:
/home/web2753/domains/domain.com/public_html/ajax/status.php
I tried creating the symlink in various places, like in the /domains/ directory;

Code:
ln -s /home/web2753/domains/domain.com/public_html/ajax/status.php
But I don't seem to get it right! If I have understood everything correctly, I'm supposed to create a symlink for status.php so the Subdomains can access it as if it was placed directly under the subdomains.

This is what my .JS file looks like (with the XMLhttprequest, this might not matter..?)

Code:
/home/web2753/domains/domain.com/public_html/javascript/edit.js

Code:
var cururl = 'htp domain com'; // this forum didn't like this url?

function createRequestObject() {
var req;

if (window.XMLHttpRequest) {
req = new XMLHttpRequest();
} else if (window.ActiveXObject) {
req = new ActiveXObject("Microsoft.XMLHTTP");
} else {
alert('Problem creating the XMLHttpRequest object');
}

return req;
}

function handleDivTag(divtag) {
var divtag;
return divtag;
}

var http = createRequestObject();
var divhandler = new handleDivTag(null);

function sendRequest(ua_id,show,series) {
http.open('get', cururl+'ajax/status.php?ua_id='+ua_id+'&show='+show+'&series='+series+'&dummy=' + new Date().getTime());
http.onreadystatechange = handleResponseTwo;
divhandler.divtag = ua_id;
http.send(null);
}

function handleResponseTwo() {
if (http.readyState == 4 && http.status == 200) {
var response = http.responseText;
if (response) {
document.getElementById('editinfo'+divhandler.divtag).innerHTML = response;
}
}
}
Everything works except of the cross-domain issue which I'm trying to overcome by creating a symlink.