function mousedown()
{
	if(event.button == 2)
	{
		alert("No right click please.");
		return false;
	}
}

function keydown()
{
	if(event.keyCode != 17 && event.keyCode != 93)
	{	
		//alert(event.keyCode);
		return true;	
	}

//if(event.keyCode != 37 || event.keyCode == 38 || event.keyCode == 39 || event.keyCode == 40)
//		return true;
//	if(event.keyCode == 13)
//		tick();
//	else
//		alert("Keyboard is disabled.");
//	return false;
}