function getElementHeight(Elem) {
  if(document.getElementById) {
    var elem = document.getElementById(Elem);
  } else if (document.all){
    var elem = document.all[Elem];
  }
  xPos = elem.offsetHeight;
  return xPos;
} 

function changeDoYouKnow() { 
  //alert(getElementHeight("doYouKnowBox"));
  $("doYouKnowBox").style.height=getElementHeight("doYouKnowBox")+"px";
  new Ajax.Request("/ajax/doYouKnow.ajax.php", {
    onSuccess: function (transport) { 
	var data = transport.responseText; 
	new Effect.Fade('doYouKnowTitleAndContent', { afterFinish: function () { 
	      $('doYouKnowTitleAndContent').update(data); 
	      new Effect.Appear('doYouKnowTitleAndContent' , { afterFinish: function () { 
		    
		    $("doYouKnowTitleAndContent").style.height="";
		  }})
		}
	  });
      }});
  
}