Assign a class to an element, or a child of the element on mouse over.

jquery.rollover.js

/*
Assign a class to an element, or a child of the element on mouse over.

$('#apps .header').rollover({
    'className' : 'glow',
    'childSelector' : 'h2',
});
*/

(function($){
    $.fn.rollover = function(options){
        options = $.extend({
            'className': null,
            'childSelector': null
        }, options);
        
        //if there is no class name there is 
        //no point of going any further
        if(options.className === null){
            return this;
        }
        
        return this.each(function(){
            var item = this;
            if(options.childSelector){
                item = $(this).children(options.childSelector)[0];
            }
            
            if(item){
                $(this).hover(function(){
                    $(item).addClass(options.className);
                },function(){
                    $(item).removeClass(options.className);
                });
            }
        });
    };
})(jQuery);