$(document).ready(function(){
    $("div#focusAreas div[id^=YellowBox]").each(function(e){
        var src = $(this).attr("id");
        $(this).mouseover(function(){
            $("div#art-home img").attr("src", function(){
                var srcString = "uploads/images/home_page_headers/" + src + ".jpg";
                return srcString;
            });
        });
    });
});