// JavaScript Document

var Event = YAHOO.util.Event;
var Dom = YAHOO.util.Dom;

function is_all_ws( nod )
{
  // Use ECMA-262 Edition 3 String and RegExp features
  return !(/[^\t\n\r ]/.test(nod.data));
}



function is_ignorable( nod )
{
  return ( nod.nodeType == 8) || // A comment node
         ( (nod.nodeType == 3) && is_all_ws(nod) ); // a text node, all ws
}


function node_before( sib )
{
  while ((sib = sib.previousSibling)) {
    if (!is_ignorable(sib)) return sib;
  }
  return null;
}

function node_after( sib )
{
  while ((sib = sib.nextSibling)) {
    if (!is_ignorable(sib)) return sib;
  }
  return null;
}

function last_child( par )
{
  var res=par.lastChild;
  while (res) {
    if (!is_ignorable(res)) return res;
    res = res.previousSibling;
  }
  return null;
}

function first_child( par )
{
  var res=par.firstChild;
  while (res) {
    if (!is_ignorable(res)) return res;
    res = res.nextSibling;
  }
  return null;
}

function data_of( txt )
{
  var data = txt.data;
  // Use ECMA-262 Edition 3 String and RegExp features
  data = data.replace(/[\t\n\r ]+/g, " ");
  if (data.charAt(0) == " ")
    data = data.substring(1, data.length);
  if (data.charAt(data.length - 1) == " ")
    data = data.substring(0, data.length - 1);
  return data;
}

Event.onDOMReady(function() {

	var tabs = Dom.getElementsByClassName('tab','a');

	if(tabs) {
		for(var i=0; i<tabs.length; i++) {
			if (first_child(tabs[i].parentNode) == tabs[i]) {
				Dom.addClass(tabs[i],'active');
				Dom.addClass(Dom.getElementsByClassName(tabs[i].id)[0],'open');
			}
			else {
				Dom.removeClass(tabs[i],'active');
				Dom.addClass(Dom.getElementsByClassName(tabs[i].id)[0],'closed');
			}
		}
		Event.on(tabs,'mousedown', function() {
			if (!Dom.hasClass(this,'active')) {
				var currentTab = Dom.getElementsByClassName('active','a',this.parentNode)[0];
				Dom.removeClass(currentTab,'active');
				Dom.replaceClass(Dom.getElementsByClassName(currentTab.id)[0],'open','closed');
				
				Dom.addClass(this,'active');
				Dom.replaceClass(Dom.getElementsByClassName(this.id)[0],'closed','open');
			}
	   });
	}
});