function leftHover(el, state)
{
	switch (state)
	{
		case 0:
			// hover off
			el.className = "left_link";
			break;
		case 1:
			// hover on
			el.className = "left_link_h";
			break;
		case 2:
			// hover down
			el.className = "left_link_down";
			break;
		case 3:
			// clicked
			el.className = "left_link"
			top.location = el.getAttribute("dest");
			break;
	}
}