function newImage( imgSrc ){

 var imgName = new Image();
 imgName.src = imgSrc;

 return imgName;

}

function change( imgName, imgLocation )
{
 document[imgName].src = imgLocation ;
}

var preloadFlag = false;
function loadImages()
{
 if (document.images)
 {
 home_over = newImage("images/home-over.jpg");
 contact_over = newImage("images/contact-over.jpg");
 aboutus_over = newImage("images/aboutus-over.jpg");
 meetings_over = newImage("images/meetings-home-over.jpg");
 calendar_over = newImage("images/calendar-home-over.jpg");
 services_over = newImage("images/services-over.jpg");

 preloadFlag = true;
 }
}