function correct_layout() {
   if(document.getElementById('content').offsetHeight) {
      var div_heights = new Array(
        document.getElementById('content').offsetHeight,
        document.getElementById('navigation').offsetHeight,
        document.getElementById('rand').offsetHeight,
        document.getElementById('rand2').offsetHeight
      );
      div_heights = div_heights.reverse(div_heights.sort(num_sort));
      var style_height = div_heights[0] + "px";
      document.getElementById('navigation').style.height = style_height;
      document.getElementById('content').style.height = style_height;
      document.getElementById('rand').style.height = style_height;
      document.getElementById('rand2').style.height = style_height;
   }
}
function num_sort(a,b) {
   return a-b;
}