function addOnloadEvent(functionCall) {
  var currentOnLoad = window.onload
  if (currentOnLoad != null) {
    window.onload = function() {
	  currentOnLoad();
	  eval(functionCall);
	}
  } else {
    window.onload = function() {
      eval(functionCall);
	}
  }
}

function getElementById(id) {
  var ns6=document.getElementById&&!document.all;
  
  myElement = ns6 ? document.getElementById(id) : document.all[id];

  return myElement;
}

function docHeight() {
	var myWidth = 0, myHeight = 0;
	if( typeof( window.innerWidth ) == 'number' ) {
		//Non-IE
		myWidth  = window.innerWidth;
		myHeight = window.innerHeight;
	} else if( document.documentElement &&
			( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
		//IE 6+ in 'standards compliant mode'
		myWidth  = document.documentElement.clientWidth;
		myHeight = document.documentElement.clientHeight;
	} else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
		//IE 4 compatible
		myWidth  = document.body.clientWidth;
		myHeight = document.body.clientHeight;
	}
	return myHeight;
}



function setBodyHeight() {
  margin = 98;
  divBody = getElementById("div-body");
  divBody.style.height = (docHeight() - margin) + "px";
}

function hidePageDescription(myCheckbox) {
  pageDescription = getElementById("page-description");
  
  if (myCheckbox.checked) {
    pageDescription.style.display = "none";
  }
  
}