function shoh(id) { 
  if(id.indexOf('_')==id.lastIndexOf('_')) 
    closeSiblings(id);  

  
  if(getDisplay(id) == 'none')
    setDisplay(id, 'block')
  else
    setDisplay(id, 'none');
    
}


function getDisplay(id){
  if (document.getElementById) {
    return document.getElementById(id).style.display;
  } else { 
    if (document.layers) {  
      return document.id.display;
    }else {
      return document.all.id.style.visibility;
    }  
  }
}

function setDisplay(id, val){
  if (document.getElementById) {
    document.getElementById(id).style.display = val;    
  } else { 
    if (document.layers) {  
      document.id.display = val;
    }else {
      document.all.id.style.display = val;
    }  
  }
}



startList = function() {
if (document.all&&document.getElementById) {
navRoot = document.getElementById("main_nav");
for (i=0; i<navRoot.childNodes.length; i++) {
node = navRoot.childNodes[i];
if (node.nodeName=="LI") {
node.onmouseover=function() {
this.className+=" over";
}
node.onmouseout=function() {
this.className=this.className.replace(" over", "");
}
}
}
}
}
window.onload=startList;


function closeSiblings(strId){
  closePrevious(document.getElementById(strId).previousSibling);
  closeNext(document.getElementById(strId).nextSibling);
  
}

function closePrevious(obj){
  if(obj){
    if(obj.id && obj.id.indexOf('main_nav')>=0 && getDisplay(obj.id)=='block')
      setDisplay(obj.id, 'none');
    closePrevious(obj.previousSibling)
  }  
}
function closeNext(obj){
  if(obj){
    if(obj.id && obj.id.indexOf('main_nav')>=0 && getDisplay(obj.id)=='block')
      setDisplay(obj.id, 'none');
    closeNext(obj.nextSibling)
  }  
}

function setActiveStyleSheet(title) {
var i, a, main;
for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
a.disabled = true;
if(a.getAttribute("title") == title) a.disabled = false;
}
}
}

function getActiveStyleSheet() {
var i, a;
for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) return a.getAttribute("title");
}
return null;
}

function getPreferredStyleSheet() {
var i, a;
for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
if(a.getAttribute("rel").indexOf("style") != -1
&& a.getAttribute("rel").indexOf("alt") == -1
&& a.getAttribute("title")
) return a.getAttribute("title");
}
return null;
}

function createCookie(name,value,days) {
if (days) {
var date = new Date();
date.setTime(date.getTime()+(days*24*60*60*1000));
var expires = "; expires="+date.toGMTString();
}
else expires = "";
document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
var nameEQ = name + "=";
var ca = document.cookie.split(';');
for(var i=0;i < ca.length;i++) {
var c = ca[i];
while (c.charAt(0)==' ') c = c.substring(1,c.length);
if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
}
return null;
}

window.onload = function(e) {
var cookie = readCookie("style");
var title = cookie ? cookie : getPreferredStyleSheet();
setActiveStyleSheet(title);
}

window.onunload = function(e) {
var title = getActiveStyleSheet();
createCookie("style", title, 365);
}

var cookie = readCookie("style");
var title = cookie ? cookie : getPreferredStyleSheet();
setActiveStyleSheet(title);



function chStyletab(id, newClass) { 
	
	if (document.getElementById) { // DOM3 = IE5, NS6
		if (document.getElementById(id).className == "passive"){
			document.getElementById(id).className = 'selected';		
		} else {
			document.getElementById(id).className = 'passive';			
		}	
	} else { 
		if (document.layers) {	
			if (document.id.className == "passive"){
				document.id.className = 'selected';
			} else {
				document.id.className = 'passive';
			}
		} else {
			if (document.all.id.className == "passive"){
				document.all.id.className = 'selected';
			} else {
				document.all.id.className = 'passive';
			}
		}
	}
}