function newImage( imgSrc ){
 
 var imgName = new Image();
 imgName.src = imgSrc;
 
 return imgName;

}

function change(imgName, imgLoc)
{
 if ( document.images && (preloadFlag == true))
 {
 
   document[imgName].src = imgLoc ;
  
 }
}

var preloadFlag = false;
function loadImages()
{
 if (document.images)
 {
 
  //****Edit this list to include vertical rollover images ****
  //****Example: aboutus_over = newImage( "images/menu-aboutus-over.gif" );
  gallery_over = newImage( "pics/gallery_dark.gif" );
    
  preloadFlag = true;
 }
}