function is_all_ws( nod )
{
  // Use ECMA-262 Edition 3 String and RegExp features
  return !(/[^\t\n\r ]/.test(nod.data));
}
function is_ignorable( nod )
{
  return ( nod.nodeType == 8) || // A comment node
         ( (nod.nodeType == 3) && is_all_ws(nod) ); // a text node, all ws
}
function last_child( par )
{
  var res=par.lastChild;
  while (res) {
    if (!is_ignorable(res)) return res;
    res = res.previousSibling;
  }
  return null;
}
function first_child( par )
{
  var res=par.firstChild;
  while (res) {
    if (!is_ignorable(res)) return res;
    res = res.nextSibling;
  }
  return null;
}

function remove_borders() {
	var div_1 = first_child(document.getElementById("line_items"));
	var div_2 = first_child(document.getElementById("line_1"));
	var div_3 = first_child(document.getElementById("line_2"));
	div_1.style.background = "transparent";
	div_2.style.background = "transparent";
	div_3.style.background = "transparent";
	}