// Richard Sweet -  2008 -  //


	function change_inst(){
	document.getElementById("inst").style.backgroundPosition = "bottom left"; 
	document.getElementById("cons").style.backgroundPosition = "top right"; 
	document.getElementById("drive").style.backgroundPosition = "bottom right";
	}
	
	function change_cons(){
	document.getElementById("inst").style.backgroundPosition = "top right"; 
	document.getElementById("cons").style.backgroundPosition = "bottom left"; 
	document.getElementById("drive").style.backgroundPosition = "top right";
	}

	function change_drive(){
	document.getElementById("inst").style.backgroundPosition = "bottom right"; 
	document.getElementById("cons").style.backgroundPosition = "top right"; 
	document.getElementById("drive").style.backgroundPosition = "bottom left";
	}


	function change_back(){
	document.getElementById("inst").style.backgroundPosition = "top left"; 
	document.getElementById("cons").style.backgroundPosition = "top left";
	document.getElementById("drive").style.backgroundPosition = "top left";
	}