Dropdown box breaks after ajax call

Dropdown box breaks after ajax call

Hello,

I have attached an onchange="" action to my dropdown box, so that it changes the content of some div. After the call, all of the dropdown box breaks, and when you click it, it just doesn't drop down. This issue occurs in Firefox only. It works fine in IE.

Here's some of my code:
<select name="someName" id="someName" onchange="updateDiv(this)" />
...

function updateDiv(obj){
var pValue = obj.options[obj.selectedIndex].value;
         alert("before call");
         try{
            $('#errorMsgDiv').load('/(..path)/ajaxValidations.jsp',{requestType:'validatePriority',priorityFor:'disc_group',priority:pValue});
         }catch(err){
            alert("error");
         }
         alert("after call");
}


In addition to updating the div, that call also pops up some messages using javascript.