// Code used to drive the cascading menu bar on the left of the page
// Adapted from "http://www.plantcell.unimelb.edu.au/"

function checkBrowser(){
  this.ver=navigator.appVersion
  this.dom=document.getElementById?1:0
  this.ie5=(this.ver.indexOf("MSIE 5")>-1 && this.dom)?1:0;
  this.ie4=(document.all && !this.dom)?1:0;
  this.ns5=(this.dom && parseInt(this.ver) >= 5) ?1:0;
  this.ns4=(document.layers && !this.dom)?1:0;
  this.bw=(this.ie5 || this.ie4 || this.ns4 || this.ns5)
  return this
}

bw=new checkBrowser()

function showhide(div,nest){
  obj=bw.dom?document.getElementById(div).style:bw.ie4?document.all[div].style:bw.ns4?nest?document[nest].document[div]:document[div]:0;
  if(obj.display=='block' || obj.display=='block') obj.display='none'
  else obj.display='block'
}

function show(div,nest){
  obj=bw.dom?document.getElementById(div).style:bw.ie4?document.all[div].style:bw.ns4?nest?document[nest].document[div]:document[div]:0;
  obj.display='block'
}

function hide(div,nest){
  obj=bw.dom?document.getElementById(div).style:bw.ie4?document.all[div].style:bw.ns4?nest?document[nest].document[div]:document[div]:0;
  obj.display='none'
}