This is crashing the IDE but works in both standalone browsers.

$("#addNew").submit(function (){
var x;
$("#UserExists").hide();
var text = $('#username').val();

var textlength = text.length;
if(textlength>2)
{
var name = $('#username').val();
var data = 'username='+name;
$.ajax({
type:"POST",
url:"CheckName.php",
data:data,
async: false,
success:function(html){
if(html=="That Username is already in use")
{
x=2;
$("#UserExists").show();
$("#UserExists").text(html);

}
if(x==2)
{
return false;

}
}
});
}

});