//var preloadFlag = false;
function preloadImages() 
{
  if (document.images) 
  {
    pre_button_home = new Image();
    pre_button_home.src = "images/button_home.gif";
    pre_button_login = new Image();
    pre_button_login = "images/button_login.gif";
    pre_button_learn = new Image();
    pre_button_learn = "images/button_learn.gif";
    pre_button_faq = new Image();
    pre_button_faq = "images/button_faq.gif";
    pre_button_contact = new Image();
    pre_button_contact = "images/button_contact.gif";
    pre_button_partners = new Image();
    pre_button_partners = "images/button_partners.gif";
    pre_button_apply = new Image();
    pre_button_apply = "images/button_apply.gif";
    preloadFlag = true;
  }
  
  if (document.images) 
  {            // Button Bar images
    img1on=new Image();
    img1on.src="images/button_home.gif";
    img1off=new Image();
    img1off.src="images/button_home_a.gif";

    img2on=new Image();
    img2on.src="images/button_apply.gif";
    img2off=new Image();
    img2off.src="images/button_apply_a.gif";

    img3on=new Image();
    img3on.src="images/button_login.gif";
    img3off=new Image();
    img3off.src="images/button_login_a.gif";

    img4on=new Image();
    img4on.src="images/button_learn.gif";
    img4off=new Image();
    img4off.src="images/button_learn_a.gif";

    img5on=new Image();
    img5on.src="images/button_faq.gif";
    img5off=new Image();
    img5off.src="images/button_faq_a.gif";

    img6on=new Image();
    img6on.src="images/button_partners.gif";
    img6off=new Image();
    img6off.src="images/button_partners_a.gif";
    
    img7on=new Image();
    img7on.src="images/button_contact.gif";
    img7off=new Image();
    img7off.src="images/button_contact_a.gif";
  }  
}
  
function imgOn(imgName) 
{
  if (document.images) 
  {
    document[imgName].src = eval(imgName + "on.src");
  }
}

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