function showDesc(id) {
	link = document.getElementById('item_'+id);
	div = document.getElementById('desc_'+id);
	link_pos_x = findPosX(link);
	link_pos_y = findPosY(link);
	if(div.style.display == 'block') {
		div.style.display = 'none';
	} else {
		div.style.left = link_pos_x+'px';
		div.style.top = link_pos_y - 50 +'px';
		div.style.display = 'block';
	}
}

function findPosY(obj) {
	var posTop = 0;
	while (obj.offsetParent) {posTop += obj.offsetTop; obj = obj.offsetParent;}
	return posTop;
}

function findPosX(obj) {
	var posLeft = 0;
	while (obj.offsetParent) {posLeft += obj.offsetLeft; obj = obj.offsetParent;}
	return posLeft;
}