// PRE-LOAD IMAGES AND SET UP SWAPPING //

if (document.images)  {

// ON IMAGES //
homeON = new Image(28,198);
homeON.src = "img/nav_home_on.gif";
employersON = new Image(28,89);
employersON.src = "img/nav_employers_on.gif";
employeesON = new Image(28,92);
employeesON.src = "img/nav_employees_on.gif";
medicalplansON = new Image(28,116);
medicalplansON.src = "img/nav_medicalplans_on.gif";
dentalON = new Image(28,108);
dentalON.src = "img/nav_dental_on.gif";
visionON = new Image(28,109);
visionON.src = "img/nav_vision_on.gif";
otherON = new Image(28,133);
otherON.src = "img/nav_other_on.gif";

aboutusON = new Image(12,57);
aboutusON.src = "img/nav_aboutus_on.gif";
newsON = new Image(12,55);
newsON.src = "img/nav_news_on.gif";
faqON = new Image(12,46);
faqON.src = "img/nav_faq_on.gif";
contactusON = new Image(12,90);
contactusON.src = "img/nav_contactus_on.gif";

// OFF IMAGES //
homeOFF = new Image(28,198);
homeOFF.src = "img/nav_home_off.gif";
employersOFF = new Image(28,89);
employersOFF.src = "img/nav_employers_off.gif";
employeesOFF = new Image(28,92);
employeesOFF.src = "img/nav_employees_off.gif";
medicalplansOFF = new Image(28,116);
medicalplansOFF.src = "img/nav_medicalplans_off.gif";
dentalOFF = new Image(28,108);
dentalOFF.src = "img/nav_dental_off.gif";
visionOFF = new Image(28,109);
visionOFF.src = "img/nav_vision_off.gif";
otherOFF = new Image(28,133);
otherOFF.src = "img/nav_other_off.gif";

aboutusOFF = new Image(12,57);
aboutusOFF.src = "img/nav_aboutus_off.gif";
newsOFF = new Image(12,55);
newsOFF.src = "img/nav_news_off.gif";
faqOFF = new Image(12,46);
faqOFF.src = "img/nav_faq_off.gif";
contactusOFF = new Image(12,90);
contactusOFF.src = "img/nav_contactus_off.gif";
}

function changeImages() {
  if (document.images) {
    for (var i=0; i<changeImages.arguments.length; i+=2) {
      document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src");
    }
  }
}