function hover(obj,id)
{
	if (id == 0) return;
	obj.style.backgroundPosition = "right 0px";
	document.getElementById("link_"+id.toString()).style.color = "purple";
}

function noHover(obj,id)
{
	if (id == 0) return;
	obj.style.backgroundPosition = "right -30px";
	document.getElementById("link_"+id.toString()).style.color = "black";
}