function keypresslistener() {
	if(document.all) document.onkeydown = keypress;
	else if(document.layers || document.getElementById) document.onkeypress = keypress;
}
up0 = new Image(31,31);  up0.src = "images/up.gif";
up1 = new Image(31,31);  up1.src = "images/up1.gif";