show_hide = function (elmt_id)
{ 
   var new_element_id = elmt_id + '_body';
    
   if (document.getElementById(elmt_id + '_body').style.display == "none") {
	 	document.getElementById(elmt_id + '_body').style.display = "block";
   } else {
	   document.getElementById(elmt_id + '_body').style.display = "none";
   }
}

  function _get_obj_toppos(obj)
 {
	var top = obj.offsetTop;
	
	while( (obj = obj.offsetParent) != null )	{
		top += obj.offsetTop;
	}
	
	return top;
}

function _get_obj_leftpos(obj)
{
	var left = obj.offsetLeft;
	
	while( (obj = obj.offsetParent) != null )	{
		left += obj.offsetLeft;
	}
	
	return left;
}