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)
 {
 //****Edit this list to include rollover state images ****
about_off = newImage("img/01about_off.gif");
about_on = newImage("img/01about_on.gif");
core_off = newImage("img/02coresve_off.gif");
core_on = newImage("img/02coresve_on.gif");
signup_off = newImage("img/03signup_off.gif");
signup_on = newImage("img/03signup_on.gif");
contact_off = newImage("img/04contact_off.gif");
contact_on = newImage("img/04contact_on.gif");
sitemap_off = newImage("img/05sitemap_off.gif");
sitemap_on = newImage("img/05sitemap_on.gif");
links_off = newImage("img/06links_off.gif");
links_on = newImage("img/06links_on.gif");
 preloadFlag = true;
 }
}