$(function() {
    var css = ['parent-hover', 'child-hover1', 'child-hover2', 'child-hover3', 'child-hover4'];
    $('#multi-ddm').dropDownMenu({ timer: 300, levels: css });
});

jQuery.preloadImages = function() {
    for (var i = 0; i < arguments.length; i++) {
        jQuery("<img>").attr("src", arguments[i]);
    }
}