function adjustLayout()
{
// Get natural heights
  var cHeight = xHeight("content_main");
  var rHeight = xHeight("navigation");

  // Find the maximum height
  var maxHeight = Math.max(cHeight, rHeight);
 
  // Assign maximum height to all columns
  xHeight("content_main", maxHeight);
  xHeight("navigation", maxHeight);
}

function resizeLayers()
{
  adjustLayout();
  xShow('body');
}

// Appearance:
function xShow(e) {
  if(!(e=xGetElementById(e))) return;
  if(e.style && xDef(e.style.visibility)) e.style.visibility='visible';
  else if(xDef(e.visibility)) e.visibility='show';
}

function xGetElementById(e) {
  if(typeof(e)!='string') return e;
  if(document.getElementById) e=document.getElementById(e);
  else if(document.all) e=document.all[e];
  else if(document.layers) e=xLayer(e);
  else e=null;
  return e;
}

function xHeight(e,uH) {
  if(!(e=xGetElementById(e))) return 0;
  if (xNum(uH)) { // v3.13.1
    if (uH<0) uH = 0;
    else uH=Math.round(uH);
  }
  else uH=0;
  var css=xDef(e.style);
  if(css && xDef(e.offsetHeight) && xStr(e.style.height)) {
    if(uH) xSetCH(e, uH);
    uH=e.offsetHeight;
  }
  else if(css && xDef(e.style.pixelHeight)) {
    if(uH) e.style.pixelHeight=uH;
    uH=e.style.pixelHeight;
  }
  else if(xDef(e.clip) && xDef(e.clip.bottom)) {
    if(uH) e.clip.bottom=uH;
    uH=e.clip.bottom;
  }
  return uH;
}

function xDef() {
  for(var i=0; i<arguments.length; ++i){if(typeof(arguments[i])=='undefined') return false;}
  return true;
}
function xNum(n) {
  return typeof(n)=='number';
}
function xStr(s) {
  return typeof(s)=='string';
}

function xSetCH(ele,uH){
  var pt=0,pb=0,bt=0,bb=0;
  if(xDef(document.defaultView) && xDef(document.defaultView.getComputedStyle)){
    pt=xGetCS(ele,'padding-top');
    pb=xGetCS(ele,'padding-bottom');
    bt=xGetCS(ele,'border-top-width');
    bb=xGetCS(ele,'border-bottom-width');
  }
  else if(xDef(ele.currentStyle,document.compatMode)){
    if(document.compatMode=='CSS1Compat'){
      pt=parseInt(ele.currentStyle.paddingTop);
      pb=parseInt(ele.currentStyle.paddingBottom);
      bt=parseInt(ele.currentStyle.borderTopWidth);
      bb=parseInt(ele.currentStyle.borderBottomWidth);
    }
  }
  else if(xDef(ele.offsetHeight,ele.style.height)){ // ?
    ele.style.height=uH+'px';
    pt=ele.offsetHeight-uH;
  }
  if(isNaN(pt)) pt=0; if(isNaN(pb)) pb=0; if(isNaN(bt)) bt=0; if(isNaN(bb)) bb=0;
  var cssH=uH-(pt+pb+bt+bb);
  if(isNaN(cssH)||cssH<0) return;
  else ele.style.height=cssH+'px';
}

function xGetCS(ele,sP)
{
	return parseInt(document.defaultView.getComputedStyle(ele,'').getPropertyValue(sP));
}