Chris,
It's hard to say without seeing the code in action. Try putting a
break on the line where $.blockUI is called. Based on your
description it would seem like $StoreUpdateForm[0] is null at that
point.
Mike
> success: function(data) {
> $StoreUpdateForm.empty().append(data);
> $("#CloseBtnID").bind("click",function(){
> $.unblockUI();
> });
> $("#SaveBtnID").bind("click",function(){
> alert("coming soon");
> });
> $.blockUI($StoreUpdateForm[0],{padding:'2px',
> borderColor:'#3F6F5E', top:'25%', left:'50%' });