var Open = ""
var Closed = ""

function preload(){
if(document.images){
  Open = new Image(16,13)
  Closed = new Image(16,13)
  Open.src = "images/open.gif"
  Closed.src = "images/closed.gif"
}}


function showhide(what,what2){
if (what.style.display=='none'){
what.style.display='';
what2.src=Open.src
}
else{
what.style.display='none'
what2.src=Closed.src
}
}