//Roll-over code		
Browser = false ;
if(document.images)
	{ Browser = true;
	
	// main left hand navigation
	
	a1 = new Image(); a1.src = "images/bt_home_1.gif";
	a2 = new Image(); a2.src = "images/bt_home_2.gif";
	
	b1 = new Image(); b1.src = "images/bt_howto_1.gif";
	b2 = new Image(); b2.src = "images/bt_howto_2.gif";
	
	c1 = new Image(); c1.src = "images/bt_play_1.gif";
	c2 = new Image(); c2.src = "images/bt_play_2.gif";
	
	
	d1 = new Image(); d1.src = "images/bt_leaderboard_1.gif";
	d2 = new Image(); d2.src = "images/bt_leaderboard_2.gif";
		
	
	
	}
	
function qb(place, imgName) {
if (Browser == true) {
document[place].src =eval(imgName + ".src");
} }

//-->