// preload nav images & rollover states
homeon = new Image();
homeon.src = "images/btn_home_rol.gif";
homeoff = new Image();
homeoff.src = "images/btn_home.gif";

howshawnon = new Image();
howshawnon.src = "images/btn_howshawn_rol.gif";
howshawnoff = new Image();
howshawnoff.src = "images/btn_howshawn.gif";

shawnworkson = new Image();
shawnworkson.src = "images/btn_shawnworks_rol.gif";
shawnworksoff = new Image();
shawnworksoff.src = "images/btn_shawnworks.gif";

serviceson = new Image();
serviceson.src = "images/btn_services_rol.gif";
servicesoff = new Image();
servicesoff.src = "images/btn_services.gif";

successon = new Image();
successon.src = "images/btn_success_rol.gif";
successoff = new Image();
successoff.src = "images/btn_success.gif";

answerson = new Image();
answerson.src = "images/btn_answers_rol.gif";
answersoff = new Image();
answersoff.src = "images/btn_answers.gif";

specialson = new Image();
specialson.src = "images/btn_specials_rol.gif";
specialsoff = new Image();
specialsoff.src = "images/btn_specials.gif";

resourceson = new Image();
resourceson.src = "images/btn_resources_rol.gif";
resourcesoff = new Image();
resourcesoff.src = "images/btn_resources.gif";

abouton = new Image();
abouton.src = "images/btn_about_rol.gif";
aboutoff = new Image();
aboutoff.src = "images/btn_about.gif";

contacton = new Image();
contacton.src = "images/btn_contact_rol.gif";
contactoff = new Image();
contactoff.src = "images/btn_contact.gif";

var currentImage="";

function imgOn(imgName) {
   if (document.images) {
      document[imgName].src = eval(imgName + "on.src");
   }
}

function imgOff(imgName) {
   if (document.images && currentImage!=imgName) {
      document[imgName].src = eval(imgName + "off.src");
   }
}

function setCurrentImage(imgName) {
   currentImage = imgName;
   imgOn(imgName);
}