[jQuery] document.getSelection() and FireFox 2.0.0.11

[jQuery] document.getSelection() and FireFox 2.0.0.11


Hi,
The following code doesn't work with FireFox. It works fine with MSIE
7. This message was generated from error consol:
Deprecated method document.getSelection() called. Please use
window.getSelection() instead.
The code :
function chkAva(lnk,id){
el = document.getElementById(id).value;
if (el == ''){
alert('The user id should have a value before check');
return;
}
av = "Available";
na = "Not Available, choose another one!"
$(document).ready(function(){
$("#"+lnk).before("<img src='imgs/wait.gif' id='waitImg' /> ");
$.ajax({url: 'chk_user.php',type:'GET', data: 'Id='+ el, cache: false,
dataType: "script", success: function(data, textStatus){
$("#waitImg").remove()
    if (data == 0){
        if (document.getElementById('av') == null){
        $("#"+lnk).after(" <span id='av' class='hint'> "+av+"</span>");
        }
        else{
            $("#av").empty();
            $("#"+lnk).after(" <span id='av' class='hint'> "+av+"</span>");
        }
    }
    else{
        if (document.getElementById('av') != null){
            $("#av").empty();
        }
        $("#"+lnk).after(" <span id='av' class='hint'> "+na+"</span>");
        }
    },
    error: function(x,txt,err){
    $("#waitImg").remove();
    alert('Could not check...'+"\n"+'The server may down or busy. Retry
again after a while.');
    }
});
});