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 ****
 //****Example: aboutus_over = newImage( "images/aboutus-over.gif" );
 buttonmain = newImage("images/main_r.gif");
 buttonbio = newImage("images/bio_r.gif");
 buttontour = newImage("images/schedule_r.gif");
 buttonmedia = newImage("images/media_r.gif");
 buttoncontact = newImage("images/contact_r.gif");
buttongallery = newImage("images/gallery_r.gif");

 preloadFlag = true;
 }
}