var image_location = "images/contact/buttons/";

//____Buttons for CONTACT AREA____
usa_0     = new Image;
usa_0.src = image_location + "usa_0.gif";
usa_1     = new Image;
usa_1.src = image_location + "usa_1.gif";
usa_2     = new Image;
usa_2.src = image_location + "usa_2.gif";
usa_3     = new Image;
usa_3.src = image_location + "usa_3.gif";

// Adam's simple rollover()
function rollover(img_name,flag)
{
    document.images[img_name].src = eval(img_name + "_" + flag + ".src");
}