$(document).ready(function() {
$("img.rollover").hover(
function() { this.src = this.src.replace("_off", "_on");
},
function() { this.src = this.src.replace("_on", "_off");
});
});


function preload(arrayOfImages) {
$(arrayOfImages).each(function(){
$('<img/>')[0].src = this;
});
}
preload(['images/skin/bg/home/cta-interior_on.png', 'images/skin/bg/home/cta-exterior_on.png', 'images/skin/bg/home/cta-commercial_off.png']);