var bLoaded;

function getObj(id){
  if (document.getElementById){
    this.obj = document.getElementById(id);
    this.style = document.getElementById(id).style;
  }
  else if (document.all){
    this.obj = document.all[id];
    this.style = document.all[id].style;
  }
  else if (document.layers){
    this.obj = getObjNN4(document,id);
    this.style = this.obj;
  }
}

function getObjNN4(obj,id){
  var lyrs = obj.layers;
  var rtn;
  for (var i=0;i<lyrs.length;i++){
    if (lyrs[i].id == id){
      return lyrs[i];
    }else if(lyrs[i].document.layers.length){
      return getObjNN4(lyrs[i].document, id);
    }
  }
  return 0;
}

function setElementStyle(id, styleProperty, styleValue)
{
  if(bLoaded){
    var obj = new getObj(id);
    if (obj.obj && obj.style){
      obj.style[styleProperty] = styleValue;
    }
  }
}

function showElement(id){
 setElementStyle( id, 'visibility', 'visible' );
}

function hideElement(id){
 setElementStyle( id, 'visibility', 'hidden' );
}

function changeClass(id, className) {
  if(bLoaded){
    var obj = new getObj(id);
    if (obj.obj) {
      obj.obj.className = className;
    }
  }
}

function bodyInit() {
  bLoaded=true;
}

function loadImages() {

var TopLeft = new Image();
TopLeft.src = 'images/newson.gif';

var TopRight = new Image();
TopRight.src = 'images/abouton.gif';

var MidLeft = new Image();
MidLeft.src = 'images/facilitieson.gif';

var MidRight = new Image();
MidRight.src = 'images/curriculumon.gif';

var BotLeft = new Image();
BotLeft.src = 'images/calendaron.gif';

var BotRight = new Image();
BotRight.src = 'images/loginon.gif';

}