function ShowBlue(){
  Hide('div_orange');
  Show('div_blue');
}

function ShowOrange(){
  Hide('div_blue');
  Show('div_orange');
}

function Show(objID){
  var objToShow = new getObj(objID)
  if (objToShow != null) {
    objToShow.style.display= 'block'
  }
}

function Hide(objID){
  var objToHide = new getObj(objID)
  if (objToHide != null) {
    objToHide.style.display= 'none'
  }
}

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