Using Menu inside UpdatePanel

A previous post of mine detailed the list of ASP.Net controls that cannot be used with UpdatePanel and ASP.Net Ajax. Since I provided a fix for the validators earlier on, I've decided to try to fix the Menu, as well. And I did! At least for my problem which involved using a two level dynamic menu inside an UpdatePanel.
Here is the code:

<script>
function FixMenu() {
    if (typeof(IsMenuFixed)!='undefined') return;
    if (!window.Menu_HideItems) return;
    window.OldMenu_HideItems=window.Menu_HideItems;
    window.Menu_HideItems=function(items) {
        try {
            OldMenu_HideItems(items);
        } catch(ex)
        {
            if (items && items.id) {
                PopOut_Hide(items.id);
            }
        }
    }
    IsMenuFixed=true;
}
</script>

Now all you have to do is load it at every page load:

ScriptManager.RegisterStartupScript(this,GetType(),"FixMenu","FixMenu();",true);

Explanation: the error I got was something like "0.cells is null or not an object", so I looked a little in the javascript code, where there was something like " for(i = 0; i < rows[0].cells.length; i++) {" and rows[0] was null. All this in a function called Menu_HideItems.

Solution 1: Copy the entire function (pretty big) and add an extra check for rows[0]==null.

Solution 2: Hijack the function, put it in a Try/Catch block and put the bit of the original function that appeared after the error in the catch. That I did.