// The following is added by Yugo to enable DHTML hide/show text

/***********************************************
* Switch Content script- © Dynamic Drive (www.dynamicdrive.com)
* This notice must stay intact for legal use. Last updated April 2nd, 2005.
* Visit http://www.dynamicdrive.com/ for full source code
***********************************************/

var enablepersist="off" //Enable saving state of content structure using session cookies? (on/off)
var collapseprevious="yes" //Collapse previously open content when opening present? (yes/no)

var contractsymbol='- ' //HTML for contract symbol. For image, use: <img src="whatever.gif">
var expandsymbol='+ ' //HTML for expand symbol.


if (document.getElementById){
document.write('<style type="text/css">')
document.write('.switchcontent{display:none;}')
document.write('</style>')
}

function getElementbyClass(rootobj, classname){
var temparray=new Array()
var inc=0
var rootlength=rootobj.length
for (i=0; i<rootlength; i++){
if (rootobj[i].className==classname)
temparray[inc++]=rootobj[i]
}
return temparray
}

function sweeptoggle(ec){
var thestate=(ec=="expand")? "block" : "none"
var inc=0
while (ccollect[inc]){
ccollect[inc].style.display=thestate
inc++
}
revivestatus()
}


function contractcontent(omit){
var inc=0
while (ccollect[inc]){
if (ccollect[inc].id!=omit)
ccollect[inc].style.display="none"
inc++
}
}

function expandcontent(curobj, cid){
var spantags=curobj.getElementsByTagName("SPAN")
var showstateobj=getElementbyClass(spantags, "showstate")
if (ccollect.length>0){
if (collapseprevious=="yes")
contractcontent(cid)
document.getElementById(cid).style.display=(document.getElementById(cid).style.display!="block")? "block" : "none"
if (showstateobj.length>0){ //if "showstate" span exists in header
if (collapseprevious=="no")
showstateobj[0].innerHTML=(document.getElementById(cid).style.display=="block")? contractsymbol : expandsymbol
else
revivestatus()
}
}
}

function revivecontent(){
contractcontent("omitnothing")
selectedItem=getselectedItem()
selectedComponents=selectedItem.split("|")
for (i=0; i<selectedComponents.length-1; i++)
document.getElementById(selectedComponents[i]).style.display="block"
}

function revivestatus(){
var inc=0
while (statecollect[inc]){
if (ccollect[inc].style.display=="block")
statecollect[inc].innerHTML=contractsymbol
else
statecollect[inc].innerHTML=expandsymbol
inc++
}
}

function get_cookie(Name) { 
var search = Name + "="
var returnvalue = "";
if (document.cookie.length > 0) {
offset = document.cookie.indexOf(search)
if (offset != -1) { 
offset += search.length
end = document.cookie.indexOf(";", offset);
if (end == -1) end = document.cookie.length;
returnvalue=unescape(document.cookie.substring(offset, end))
}
}
return returnvalue;
}

function getselectedItem(){
if (get_cookie(window.location.pathname) != ""){
selectedItem=get_cookie(window.location.pathname)
return selectedItem
}
else
return ""
}

function saveswitchstate(){
var inc=0, selectedItem=""
while (ccollect[inc]){
if (ccollect[inc].style.display=="block")
selectedItem+=ccollect[inc].id+"|"
inc++
}

document.cookie=window.location.pathname+"="+selectedItem
}

function do_onload(){
uniqueidn=window.location.pathname+"firsttimeload"
var alltags=document.all? document.all : document.getElementsByTagName("*")
ccollect=getElementbyClass(alltags, "switchcontent")
statecollect=getElementbyClass(alltags, "showstate")
if (enablepersist=="on" && ccollect.length>0){
document.cookie=(get_cookie(uniqueidn)=="")? uniqueidn+"=1" : uniqueidn+"=0" 
firsttimeload=(get_cookie(uniqueidn)==1)? 1 : 0 //check if this is 1st page load
if (!firsttimeload)
revivecontent()
}
if (ccollect.length>0 && statecollect.length>0)
revivestatus()
}

if (window.addEventListener)
window.addEventListener("load", do_onload, false)
else if (window.attachEvent)
window.attachEvent("onload", do_onload)
else if (document.getElementById)
window.onload=do_onload

if (enablepersist=="on" && document.getElementById)
window.onunload=saveswitchstate


/*** Disabled - broken in IE ***
function changeDisplayState (id) {
  e=document.getElementById(id);
  if (e.style.display == 'none' || e.style.display =="") {
    e.style.display = 'block';
    showhide.innerHTML = 'Hide text...';
  } else {
    e.style.display = 'none';
    showhide.innerHTML = 'Read more...';
  }
}
*********************************/

/* The following is originally from Bryanne's template */

if (document.images)
 {
 
home_off = new Image();
home_off.src = "../images/nav_home.gif";
home_on = new Image();
home_on.src = "../images/nav_home_black.gif";

courses_off = new Image();
courses_off.src = "../images/nav_courses.gif";
courses_on = new Image();
courses_on.src = "../images/nav_courses_black.gif";

conferences_off = new Image();
conferences_off.src = "../images/nav_conferences.gif";
conferences_on = new Image();
conferences_on.src = "../images/nav_conferences_black.gif";

events_off = new Image();
events_off.src = "../images/nav_events.gif";
events_on = new Image();
events_on.src = "../images/nav_events_black.gif";

pubs_off = new Image();
pubs_off.src = "../images/nav_pubs.gif";
pubs_on = new Image();
pubs_on.src = "../images/nav_pubs_black.gif";

faculty_off = new Image();
faculty_off.src = "../images/nav_faculty.gif";
faculty_on = new Image();
faculty_on.src = "../images/nav_faculty_black.gif";

advisory_off = new Image();
advisory_off.src = "../images/nav_advisory.gif";
advisory_on = new Image();
advisory_on.src = "../images/nav_advisory_black.gif";

dvd_off = new Image();
dvd_off.src = "../images/nav_dvd.gif";
dvd_on = new Image();
dvd_on.src = "../images/nav_dvd_black.gif";

contact_off = new Image();
contact_off.src = "../images/nav_contact.gif";
contact_on = new Image();
contact_on.src = "../images/nav_contact_black.gif";

cils_off = new Image();
cils_off.src = "../images/nav_cils.gif";
cils_on = new Image();
cils_on.src = "../images/nav_cils_black.gif";

}
function flip()
{
if (document.images) 
  {
var num_arg = arguments.length;
if (num_arg == 0 || (num_arg % 2) != 0) return;
for (var i=0; i<num_arg; i) 
     {
	var j = i+1;
	var imgname = arguments[i];
	var imgsrc = arguments[j];
	document.images[imgname].src = eval(imgsrc+'.src');
	i+=2;
     }
  }
}