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/homebuttonover.gif");
 media_over = newImage("images/mediabuttonover.gif");
 press_over = newImage("images/pressbuttonover.gif");
 aboutme_over = newImage("images/aboutmebuttonover.gif");
 contact_over = newImage("images/contactbuttonover.gif");
 
 preloadFlag = true;
 }
}