jQuery(function($) {
    $('.ro').mouseover(function() {
		if (!$(this).data('src')) {
		    a = this.src.substr(0, this.src.length - 4);
		    b = this.src.substr(this.src.length - 4, 4);
		    $(this).data('src', [a, b]);
		}
		if ($(this).parent('a')[0].href == window.location.href) {
			this.src = $(this).data('src')[0] + '_in' + $(this).data('src')[1];
		} else {
			this.src = $(this).data('src')[0] + '_on' + $(this).data('src')[1];
		}
	}).mouseover();
	$('.ro').mouseout(function() {
		if ($(this).parent('a')[0].href != window.location.href) {
			this.src = $(this).data('src')[0] + $(this).data('src')[1];
		}
	}).mouseout();
});