Sort dropdown/select list items using jQuery

sortDropDownListByText.js

function sortDropDownListByText(dropdownlist) {
    dropdownlist.children("option[value='']").remove();

    // Sort all the options by text
    dropdownlist.html($("option", dropdownlist).sort(function(a, b) {
        return a.text === b.text ? 0 : a.text < b.text ? -1 : 1;
    }));

    dropdownlist.prepend(' ');
    dropdownlist.children("option[value='']").attr('selected', 'selected');
}