function equal_columns()
        {
        var a = document.getElementById('left_side');
        var b = document.getElementById('content');
        if(b.offsetHeight > a.offsetHeight)
        {
        a.style.height = b.offsetHeight + 'px';
        }
        if(b.offsetHeight < a.offsetHeight)
        {
        b.style.height = a.offsetHeight + 'px';
        }
}
//window.onload = equal_columns;

google.setOnLoadCallback(function() {
 window.addEvent('domready', function() {
  height1 = parseInt($("left_side").getStyle("height"));
  height2 = parseInt($("content").getStyle("height"));
  max = Math.max(height1,height2);
  $("left_side").setStyle("height",max+"px");
  $("content").setStyle("height",max+"px");
 });
});