Any way to make jQuery.inArray() case insensitive?

Question

Title sums it up.

Answer 1

Thank you to @Drew Wills.

I rewrote it as this:

function inArrayCaseInsensitive(needle, haystackArray){
    //Iterates over an array of items to return the index of the first item that matches the provided val ('needle') in a case-insensitive way.  Returns -1 if no match found.
    var defaultResult = -1;
    var result = defaultResult;
    $.each(haystackArray, function(index, value) { 
        if (result == defaultResult && value.toLowerCase() == needle.toLowerCase()) {
            result = index;
        }
    });
    return result;
}