function adjustLayout()
{
  var cHeight = xHeight("main_content");
  var lHeight = xHeight("left_content");
  var maxHeight = Math.max(cHeight,lHeight);
  xHeight("main_wrap", maxHeight);
  xHeight("left_wrap", maxHeight);
  xShow("footer");
}
window.onload = function()
{
  xAddEventListener(window, "resize", adjustLayout, false);
  adjustLayout();
}