var pop
function popup(url,p)//opens a winow in pop up with param: p
{
	if(pop!=null && !pop.closed) pop.close()
	pop=window.open(url,"pop",p)
	pop.focus()
}

//var spnLastMsgSubject = null;
//  function openInfo(msgHeader,id) {
//	 var p = document.getElementById("a_" + id);
//		if (spnLastMsgSubject) spnLastMsgSubject.style.fontWeight = "";
//		if (document.getElementById(id).style.display == "none") {
//			document.getElementById(id).style.display = "";
//			p.style.fontWeight="bold";
//			spnLastMsgSubject = p;
//		} else {
//			document.getElementById(id).style.display = "none" ;
//			spnLastMsgSubject = null;
//		    }
//  }
  
// this function expands teacher notes
	function toggleExpandable( element ) {
		var box = element.parentNode;
		box.className = ( box.className == 'expanded' ) ? 'expandable':'expanded';
	}

// this function expands slides
	function toggleSlide( element ) {
		var slide = element.parentNode;
		slide.className = ( slide.className == 'hide' ) ? 'show':'hide';
	}
	
// this function expandes content notes
	function toggleList( element ) {
		var list = element.parentNode;
		list.className = ( list.className == 'group' ) ? 'collapse':'group';
	}