var win = null;

function NewWindow(mypage,myname,w,h,scroll){
LeftPosition = (screen.width) ? (screen.width-w)/2 : 0;
TopPosition = (screen.height) ? (screen.height-h)/2 : 0;
settings =
'height='+h+',width='+w+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',resizable'
win = window.open(mypage,myname,settings)
}


var activeSection = 0;
function swapList(section) {
  var targetElement = document.getElementById(section);
  if (targetElement){
	  if (targetElement.style.display == "none")
	    targetElement.style.display = "" ;
	  else
	    targetElement.style.display = "none" ;
	}
}

function clickLink(section) {
  if (activeSection != 0) {
    var oldElement = document.getElementById(activeSection);
    swapList (activeSection);
  }
  if (activeSection != section) {
    swapList(section);
    activeSection = section;
  }
  else
    activeSection = 0;
}