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];
}
function portrait_popup(event_el) {
  pos = findPos(event_el);
	
  document.getElementById('portrait_detail').style.display = 'block';
  document.getElementById('portrait_detail').style.left = pos[0]+'px';
  document.getElementById('portrait_detail').style.top = pos[1]+'px';
  
}