$(document).ready(function(){
    $(".button").hover(function() {
        $(this).attr("src","/img/layout/button_learn_more_hv.png");
            }, function() {
        $(this).attr("src","/img/layout/button_learn_more.png");
    });
});

$(document).ready(function(){
    $(".submit").hover(function() {
        $(this).attr("src","/img/layout/button_submit_hv.png");
            }, function() {
        $(this).attr("src","/img/layout/button_submit.png");
    });
});