XmlHttpRequest not working on Mobile Browser

Question

function ajaxify()
    {
     alert('stuff');
     xmlHttp = new XMLHttpRequest();
     xmlHttp.open('GET', 'page.php?params=' + params, true);
     xmlHttp.onreadystatechange = callbackFunction;
     xmlHttp.send();

    }

function callbackFunction(){
alert('called');
}

Never alerts "called", but does alert "stuff". Testing on iPhone 4.2.1 and Windows 7 Phone. Doesn't work on either. I'm told it works on newer phones. Works on desktop browser. The page is loaded, but the callbackFunction is never called. Any way of fixing this?

EDIT: Note, I also tried xmlHttp.onload , seems like the same issue.

Answer 1

You have a syntax error. forgot ' after params= :

xmlHttp.open( 'GET', 'page.php?params="' + params, true)