function showHover()
{
	var toppadding = 20;

	var mainphoto = document.getElementById ("mainphoto");
	var hoverdiv = document.getElementById ("hoverdiv");
	var hoverdiv = document.getElementById ("hoverdiv");
	var pos = findPos (mainphoto);

	var x = pos[0] + mainphoto.width/2 - 145; // - hoverdiv.style.width;
	var y = pos[1] + toppadding;

	hoverdiv.style.left = x;
	hoverdiv.style.top  = y;
	hoverdiv.style.display = "block";

}


function hideHover()
{
	var hoverdiv = document.getElementById ("hoverdiv");
	hoverdiv.style.display = "none";
}


function findPos(obj) {
	var curleft = curtop = 0;
	if (obj.offsetParent) {
		curleft = obj.offsetLeft
		curtop = obj.offsetTop
		while (obj = obj.offsetParent) {
			curleft += obj.offsetLeft
			curtop += obj.offsetTop
		}
	}
	return [curleft,curtop];
}