function showMenu (id) {
	div_id="div"+id;
	base_id="base"+id;
	document.getElementById(div_id).style.visibility = "visible";
	var start_point = document.getElementById(base_id); 
	document.getElementById(div_id).style.top = absPosition(start_point).y;//+ Number(document.getElementById("menu_tr").height); // Сдвигаемся вниз на высоту ячейки
	document.getElementById(div_id).style.left = absPosition(start_point).x;	
/*	document.getElementById(div_id).innerHTML = "<nobr>" +absPosition(start_point).y + " + " + document.getElementById("menu_tr").height + " = "+ document.getElementById(div_id).style.top  +"</nobr>";*/
}

function hideMenu (id) {
	div_id="div"+id;
	document.getElementById(div_id).style.visibility="hidden";
}

function absPosition(obj) {
      var x = y = 0;
      while(obj) {
            x += obj.offsetLeft;
            y += obj.offsetTop;
            obj = obj.offsetParent;
      }
      return {x:x, y:y};
}