function roll(ID,img)
{
	ID.src = "images/" + img;
}

function view(img)
{
	window.open(img,'download','width=600,height=400');
}

function preload()
{
	pre1 = new Image(175,30);
	pre1.src = "images/About_on.gif";
	
	pre2 = new Image(125,30);
	pre2.src = "images/Books_on.gif";
	
	pre3 = new Image(170,30);
	pre3.src = "images/Real_on.gif";
	
	pre4 = new Image(130,30);
	pre4.src = "images/Wallpaper_on.gif";	
}