addLoadEvent(identify_links);

function identify_links() {
var the_images = document.images;
   for (i=0;i<the_images.length;i++) {
     if (the_images[i].parentNode.className == "navigationlink") {
     loadimages(the_images[i]);
     }
   }
}

function loadimages(the_image,thecurrentlink) {
    the_image.first = new Image();
    the_image.first.src = "http://crewandhowell.com/images/"+the_image.id+"_2.jpg";

    the_image.second = new Image();
    the_image.second.src = "http://crewandhowell.com/images/"+the_image.id+".jpg";

    the_image.onmouseover = swapover;
    the_image.onmouseout = swapback;
}

function swapover() {
    this.src = this.second.src;
}

function swapback() {
    this.src = this.first.src;
}