function setpagelength() {
  econtent = document.getElementById('content_block');
  esidebar = document.getElementById('sidebar');
  hc = econtent.clientHeight;
  hs = esidebar.clientHeight;
	nl = Math.max(hc,hs);
	nl = Math.max(nl, 475);
  econtent.style.height = nl+'px';
  esidebar.style.height = nl+'px';
}