function openBox1 (){
	GB_showCenter('Chess','http://kidszone.schoolwebsite.co.uk/chess.htm',600,798);
}

function openBox2 (){
	GB_showCenter('Balloon Shooting','http://kidszone.schoolwebsite.co.uk/balloon_shooting.htm',444,665);
}

function openBox3 (){
	GB_showCenter('Asteroids','http://kidszone.schoolwebsite.co.uk/asteroids.htm',400,550);
}

function openBox4 (){
	GB_showCenter('Space Invaders','http://kidszone.schoolwebsite.co.uk/si.htm',420,460);
}

function openBox5 (){
	GB_showCenter('Ball','http://kidszone.schoolwebsite.co.uk/ball.htm',520,600);
}

function openBox6 (){
	GB_showCenter('Etch','http://kidszone.schoolwebsite.co.uk/Etch.htm',370,450);
}