function getPageOffsetLeft(el) {

  var x;
  x = el.offsetLeft;
  if (el.offsetParent != null)
    x += getPageOffsetLeft(el.offsetParent);

  return x;
}

function getPageOffsetTop(el) {

  var y;
  y = el.offsetTop;
  if (el.offsetParent != null)
    y += getPageOffsetTop(el.offsetParent);

  return y;
}
function menu_ov(id)
	{
		var im = document.getElementById(id);
        im.src = '/img/menu_'+ id +'_sel.jpg';
		if (id == 'serv') {
			var ser = document.getElementById('big_serv');
			var x = getPageOffsetLeft(im);
			var y = getPageOffsetTop(im);
			x = x - 223;
			y = y + 60;
			ser.style.left  = x + "px";
			ser.style.top = y + "px";
		    ser.style.visibility = "visible";

						  }

	};
function menu_out(id)
	{

		if (id != 'serv1') {
			var ser = document.getElementById('big_serv');
		    ser.style.visibility = "hidden";
		var im = document.getElementById(id);
        im.src = '/img/menu_'+id+'.jpg'; }
						  
		if (id == 'serv1') {
			var ser = document.getElementById('big_serv');
		    ser.style.visibility = "hidden";
						  }
						  
	};
function menuMouseover(id)
	{
		var im = document.getElementById('serv');
        im.src = '/img/menu_serv_sel.jpg';
		var m = document.getElementById('big_serv');
		m.style.visibility = "visible";
	}
function menuMouseout(id)
	{
			if (id == 'serv') {
		var im = document.getElementById('serv');
        im.src = '/img/menu_serv.jpg';
						  }
		var m = document.getElementById('big_serv');
		m.style.visibility = "hidden";
	}