function preloadColours() {
	
	greenBullet = document.createElement("img");
	greenBullet.setAttribute("src","media/rollover_colours/green_bullet.gif");
	
	greenOpen = document.createElement("img");
	greenOpen.setAttribute("src","media/rollover_colours/green_openarrow.gif");
	
	
	pinkBullet = document.createElement("img");
	pinkBullet.setAttribute("src","media/rollover_colours/pink_bullet.gif");
	
	pinkOpen = document.createElement("img");
	pinkOpen.setAttribute("src","media/rollover_colours/pink_openarrow.gif");
	
	
	yellowBullet = document.createElement("img");
	yellowBullet.setAttribute("src","media/rollover_colours/yellow_bullet.gif");
	
	yellowOpen = document.createElement("img");
	yellowOpen.setAttribute("src","media/rollover_colours/yellow_openarrow.gif");
	
	
	turquoiseBullet = document.createElement("img");
	turquoiseBullet.setAttribute("src","media/rollover_colours/turquoise_bullet.gif");
	
	turquoiseOpen = document.createElement("img");
	turquoiseOpen.setAttribute("src","media/rollover_colours/turquoise_openarrow.gif");
	
	
	redBullet = document.createElement("img");
	redBullet.setAttribute("src","media/rollover_colours/red_bullet.gif");
	
	redOpen = document.createElement("img");
	redOpen.setAttribute("src","media/rollover_colours/red_openarrow.gif");
	}

addLoadEvent(preloadColours);