// JavaScript Document
function setH() {
    var maxH = Math.max(document.getElementById('main_content_left').offsetHeight, document.getElementById('main_content_right').offsetHeight);
    document.getElementById('main_content_left').style.height=maxH+'px';
    document.getElementById('main_content_right').style.height=maxH+'px';
  }

window.onload=setH;