/***********************************************
  * AnyLink Drop Down Menu- © Dynamic Drive (www.dynamicdrive.com)
  * This notice MUST stay intact for legal use
  * Visit http://www.dynamicdrive.com/ for full source code
  ***********************************************/

  //Contents for menu1 Anatomy
  var menu1=new Array()
  menu1[0]='<a href="http://synapses.clm.utexas.edu/anatomy/hippo/hippo.stm">Hippocampus</a>'
  menu1[1]='<a href="http://synapses.clm.utexas.edu/anatomy/axon/axonsh.stm">Axons</a>'
  menu1[2]='<a href="http://synapses.clm.utexas.edu/anatomy/dendrite/dendrite.stm">Dendrites</a>'
  menu1[3]='<a href="http://synapses.clm.utexas.edu/anatomy/astrocyte/astrocyte.stm">Astrocytes</a>'
  menu1[4]='<a href="http://synapses.clm.utexas.edu/anatomy/chemical/synapse.stm">Synapses</a>'
  menu1[5]='<a href="http://synapses.clm.utexas.edu/anatomy/organelles/organelles.stm">Organelles</a>'
  menu1[6]='<a href="http://synapses.clm.utexas.edu/atlas/contents.stm">Atlas of ultrastructure</a>'

  //Contents for menu2 Links, and so on
  var menu2=new Array()
  menu2[0]='<a href="http://synapses.clm.utexas.edu/lab/lab.stm">Harris Lab</a>'
  menu2[1]='<a href="http://synapses.clm.utexas.edu/positions/positions.stm">Positions</a>'
  menu2[5]='<a href="http://synapses.clm.utexas.edu/citation/citation.asp">Citation</a>'
  menu2[6]='<a href="http://synapses.bu.edu/">synapses.bu.edu</a>'
  
  //Contents for menu3 Tools, and so on
  var menu3=new Array()
  menu3[0]='<a href="http://synapses.clm.utexas.edu/lab/howto/index.stm">Lab Protocols</a>'
  menu3[1]='<a href="http://synapses.clm.utexas.edu/tools/reconstruct/reconstruct.stm">Software</a>'
  menu3[2]='<a href="http://synapses.clm.utexas.edu/tools/reconstruct/about.stm">About</a>'
  menu3[3]='<a href="http://synapses.clm.utexas.edu/tools/reconstruct/formats.stm">File Format</a>'
  menu3[4]='<a href="http://synapses.clm.utexas.edu/tools/reconstruct/manual.stm">User Manual</a>'
  menu3[5]='<a href="http://synapses.clm.utexas.edu/tools/reconstruct/history.stm">History</a>'
  menu3[6]='<a href="http://groups.yahoo.com/group/reconstruct_users/">User Group</a>'
  menu3[7]='<a href="http://synapses.bu.edu/">synapses.bu.edu</a>'
  
  var menuwidth='170px' //default menu width
  var menubgcolor='black'  //menu bgcolor
  var disappeardelay=250  //menu disappear speed onMouseout (in miliseconds)
  var hidemenu_onclick="yes" //hide menu when user clicks within menu?

  /////No further editting needed

  var ie4=document.all
  var ns6=document.getElementById&&!document.all

  if (ie4||ns6)
  document.write('<div id="dropmenudiv" style="visibility:hidden;width:'+menuwidth+';background-color:'+menubgcolor+'" onMouseover="clearhidemenu()" onMouseout="dynamichide(event)"></div>')

  function getposOffset(what, offsettype){
  var totaloffset=(offsettype=="left")? what.offsetLeft : what.offsetTop;
  var parentEl=what.offsetParent;
  while (parentEl!=null){
  totaloffset=(offsettype=="left")? totaloffset+parentEl.offsetLeft : totaloffset+parentEl.offsetTop;
  parentEl=parentEl.offsetParent;
  }
  return totaloffset;
  }


  function showhide(obj, e, visible, hidden, menuwidth){
  if (ie4||ns6)
  dropmenuobj.style.left=dropmenuobj.style.top="-500px"
  if (menuwidth!=""){
  dropmenuobj.widthobj=dropmenuobj.style
  dropmenuobj.widthobj.width=menuwidth
  }
  if (e.type=="click" && obj.visibility==hidden || e.type=="mouseover")
  obj.visibility=visible
  else if (e.type=="click")
  obj.visibility=hidden
  }

  function iecompattest(){
  return (document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body
  }

  function clearbrowseredge(obj, whichedge){
  var edgeoffset=0
  if (whichedge=="rightedge"){
  var windowedge=ie4 && !window.opera? iecompattest().scrollLeft+iecompattest().clientWidth-15 : window.pageXOffset+window.innerWidth-15
  dropmenuobj.contentmeasure=dropmenuobj.offsetWidth
  if (windowedge-dropmenuobj.x < dropmenuobj.contentmeasure)
  edgeoffset=dropmenuobj.contentmeasure-obj.offsetWidth
  }
  else{
  var topedge=ie4 && !window.opera? iecompattest().scrollTop : window.pageYOffset
  var windowedge=ie4 && !window.opera? iecompattest().scrollTop+iecompattest().clientHeight-15 : window.pageYOffset+window.innerHeight-18
  dropmenuobj.contentmeasure=dropmenuobj.offsetHeight
  if (windowedge-dropmenuobj.y < dropmenuobj.contentmeasure){ //move up?
  edgeoffset=dropmenuobj.contentmeasure+obj.offsetHeight
  if ((dropmenuobj.y-topedge)<dropmenuobj.contentmeasure) //up no good either?
  edgeoffset=dropmenuobj.y+obj.offsetHeight-topedge
  }
  }
  return edgeoffset
  }

  function populatemenu(what){
  if (ie4||ns6)
  dropmenuobj.innerHTML=what.join("")
  }


  function dropdownmenu(obj, e, menucontents, menuwidth){
  if (window.event) event.cancelBubble=true
  else if (e.stopPropagation) e.stopPropagation()
  clearhidemenu()
  dropmenuobj=document.getElementById? document.getElementById("dropmenudiv") : dropmenudiv
  populatemenu(menucontents)

  if (ie4||ns6){
  showhide(dropmenuobj.style, e, "visible", "hidden", menuwidth)
  dropmenuobj.x=getposOffset(obj, "left")
  dropmenuobj.y=getposOffset(obj, "top")
  dropmenuobj.style.left=dropmenuobj.x-clearbrowseredge(obj, "rightedge")+"px"
  dropmenuobj.style.top=dropmenuobj.y-clearbrowseredge(obj, "bottomedge")+obj.offsetHeight+"px"
  }

  return clickreturnvalue()
  }

  function clickreturnvalue(){
  if (ie4||ns6) return false
  else return true
  }

  function contains_ns6(a, b) {
  while (b.parentNode)
  if ((b = b.parentNode) == a)
  return true;
  return false;
  }

  function dynamichide(e){
  if (ie4&&!dropmenuobj.contains(e.toElement))
  delayhidemenu()
  else if (ns6&&e.currentTarget!= e.relatedTarget&& !contains_ns6(e.currentTarget, e.relatedTarget))
  delayhidemenu()
  }

  function hidemenu(e){
  if (typeof dropmenuobj!="undefined"){
  if (ie4||ns6)
  dropmenuobj.style.visibility="hidden"
  }
  }

  function delayhidemenu(){
  if (ie4||ns6)
  delayhide=setTimeout("hidemenu()",disappeardelay)
  }

  function clearhidemenu(){
  if (typeof delayhide!="undefined")
  clearTimeout(delayhide)
  }

  if (hidemenu_onclick=="yes")
  document.onclick=hidemenu