sdtab={
	tabClass:'sdtab', 
	listClass:'sdtabs', 
	activeClass:'active', 
	contentElements:'div', 
	backToLinks:/#top/, 
	printID:'sdtabprintview', 
	showAllLinkText:'show all content', 
	prevNextIndicator:'doprevnext', 
	prevNextClass:'prevnext', 
	prevLabel:'previous', 
	nextLabel:'next', 
	prevClass:'prev', 
	nextClass:'next', 
	init:function(){
		var temp;
		if (!document.getElementById || !document.createTextNode)
		{
			return;
		}
		var tempelm = document.getElementsByTagName('div');		
		for (var i = 0 ; i < tempelm.length ; i++)
		{
			if (!sdtab.cssjs('check', tempelm[i], sdtab.tabClass))
			{
				continue;
			}
			sdtab.initTabMenu(tempelm[i]);
			sdtab.removeBackLinks(tempelm[i]);
			if (sdtab.cssjs('check', tempelm[i], sdtab.prevNextIndicator))
			{
				sdtab.addPrevNext(tempelm[i]);
			}
			sdtab.checkURL();
		}
		if (document.getElementById(sdtab.printID) && !document.getElementById(sdtab.printID).getElementsByTagName('a')[0])
		{
			var newlink = document.createElement('a');
			newlink.setAttribute('href', '#');
			sdtab.addEvent(newlink, 'click', sdtab.showAll, false);
			newlink.onclick = function(){ return false; } // safari hack
			newlink.appendChild(document.createTextNode(sdtab.showAllLinkText));
			document.getElementById(sdtab.printID).appendChild(newlink);
		}
	},
	checkURL:function()
	{
		var id;
		var loc = window.location.toString();
		loc = /#/.test(loc) ? loc.match(/#(\w.+)/)[1] : '';
		if (loc == '')
		{
			return;
		}
		var elm = document.getElementById(loc);
		if (!elm)
		{
			return;
		}
		var parentMenu = elm.parentNode.parentNode.parentNode;
		parentMenu.currentSection = loc;
		if (parentMenu.getElementsByTagName(sdtab.contentElements)[0].className != 'post_content')
		{
			parentMenu.getElementsByTagName(sdtab.contentElements)[0].style.display='none';
		}
		sdtab.cssjs('remove', parentMenu.getElementsByTagName('a')[0].parentNode, sdtab.activeClass);
		var links = parentMenu.getElementsByTagName('a');
		for (i = 0 ; i < links.length ; i++)
		{
			if (!links[i].getAttribute('href'))
			{
				continue;
			}
			if (!/#/.test(links[i].getAttribute('href').toString()))
			{
				continue;
			}
			id = links[i].href.match(/#(\w.+)/)[1];
			if (id == loc)
			{
				var cur = links[i].parentNode.parentNode;
				sdtab.cssjs('add', links[i].parentNode, sdtab.activeClass);
				break;
			}
		}
		sdtab.changeTab(elm, 1);
		elm.focus();
		cur.currentLink = links[i];
		cur.currentSection = loc;
	},
	showAll:function(e)
	{
		document.getElementById(sdtab.printID).parentNode.removeChild(document.getElementById(sdtab.printID));
		var tempelm = document.getElementsByTagName('div');		
		for (var i = 0 ; i < tempelm.length ; i++)
		{
			if (!sdtab.cssjs('check', tempelm[i], sdtab.tabClass))
			{
				continue;
			}
			var sec = tempelm[i].getElementsByTagName(sdtab.contentElements);
			for (var j = 0 ; j < sec.length ; j++)
			{
				sec[j].style.display = 'block';
			}
		}
		var tempelm = document.getElementsByTagName('ul');		
		for (i = 0 ; i < tempelm.length ; i++)
		{
			if (!sdtab.cssjs('check', tempelm[i], sdtab.prevNextClass))
			{
				continue;
			}
			tempelm[i].parentNode.removeChild(tempelm[i]);
			i--;
		}
		sdtab.cancelClick(e);
	},
	addPrevNext:function(menu)
	{
		var temp;
		var sections = menu.getElementsByTagName(sdtab.contentElements);
		for (var i = 0 ; i < sections.length ; i++)
		{
			temp = sdtab.createPrevNext();
			if (i == 0)
			{
				temp.removeChild(temp.getElementsByTagName('li')[0]);
			}
			if (i == sections.length - 1)
			{
				temp.removeChild(temp.getElementsByTagName('li')[1]);
			}
			temp.i = i; // h4xx0r!
			temp.menu = menu;
			sections[i].appendChild(temp);
		}
	},
	removeBackLinks:function(menu)
	{
		var links = menu.getElementsByTagName('a');
		for (var i = 0 ; i < links.length ; i++)
		{
			if (!sdtab.backToLinks.test(links[i].href))
			{
				continue;
			}
			links[i].parentNode.removeChild(links[i]);
			i--;
		}
	},
	initTabMenu:function(menu)
	{
		var id;
		var lists = menu.getElementsByTagName('ul');
		for (var i = 0 ; i < lists.length ; i++)
		{
			if (sdtab.cssjs('check', lists[i], sdtab.listClass))
			{
				var thismenu = lists[i];
				break;
			}
		}
		if (!thismenu)
		{
			return;
		}
		thismenu.currentSection = '';
		thismenu.currentLink = '';
		var links = thismenu.getElementsByTagName('a');
		for ( i = 0 ; i < links.length ; i++)
		{
			if (!/#/.test(links[i].getAttribute('href').toString()))
			{
				continue;
			}
			id = links[i].href.match(/#(\w.+)/)[1];
			if (document.getElementById(id))
			{
				sdtab.addEvent(links[i], 'click', sdtab.showTab, false);
				links[i].onclick = function(){ return false; } // safari hack
				sdtab.changeTab(document.getElementById(id), 0);
			}
		}
		id = links[0].href.match(/#(\w.+)/)[1];
		if (document.getElementById(id))
		{
			sdtab.changeTab(document.getElementById(id), 1);
			thismenu.currentSection = id;
			thismenu.currentLink = links[0];
			sdtab.cssjs('add', links[0].parentNode, sdtab.activeClass);
		}
	},
	createPrevNext:function()
	{
		var temp = document.createElement('ul');
		temp.className = sdtab.prevNextClass;
		temp.appendChild(document.createElement('li'));
		temp.getElementsByTagName('li')[0].appendChild(document.createElement('a'));
		temp.getElementsByTagName('a')[0].setAttribute('href', '#');
		temp.getElementsByTagName('a')[0].innerHTML = sdtab.prevLabel;
		temp.getElementsByTagName('li')[0].className = sdtab.prevClass;
		temp.appendChild(document.createElement('li'));
		temp.getElementsByTagName('li')[1].appendChild(document.createElement('a'));
		temp.getElementsByTagName('a')[1].setAttribute('href', '#');
		temp.getElementsByTagName('a')[1].innerHTML = sdtab.nextLabel;
		temp.getElementsByTagName('li')[1].className = sdtab.nextClass;
		sdtab.addEvent(temp.getElementsByTagName('a')[0], 'click', sdtab.navTabs, false);
		sdtab.addEvent(temp.getElementsByTagName('a')[1], 'click', sdtab.navTabs, false);
		// safari fix
		temp.getElementsByTagName('a')[0].onclick = function(){ return false; }
		temp.getElementsByTagName('a')[1].onclick = function(){ return false; }
		return temp;
	},
	navTabs:function(e)
	{
		var li = sdtab.getTarget(e);
		var menu = li.parentNode.parentNode.menu;
		var count = li.parentNode.parentNode.i;
		var section = menu.getElementsByTagName(sdtab.contentElements);
		var links = menu.getElementsByTagName('a');
		var othercount = (li.parentNode.className == sdtab.prevClass) ? count - 1 : count + 1;
		section[count].style.display = 'none';
		sdtab.cssjs('remove', links[count].parentNode, sdtab.activeClass);
		section[othercount].style.display = 'block';
		sdtab.cssjs('add', links[othercount].parentNode, sdtab.activeClass);
		var parent = links[count].parentNode.parentNode;
		parent.currentLink = links[othercount];
		parent.currentSection = links[othercount].href.match(/#(\w.+)/)[1];
		sdtab.cancelClick(e);
	},
	changeTab:function(elm,state)
	{
		do
		{
			elm = elm.parentNode;
		} while(elm.nodeName.toLowerCase() != sdtab.contentElements)
		elm.style.display = (state == 0) ? 'none' : 'block';
	},
	showTab:function(e)
	{
		var o = sdtab.getTarget(e);
		if (o.parentNode.parentNode.currentSection != '')
		{
			sdtab.changeTab(document.getElementById(o.parentNode.parentNode.currentSection), 0);
			sdtab.cssjs('remove', o.parentNode.parentNode.currentLink.parentNode, sdtab.activeClass);
		}
		var id = o.href.match(/#(\w.+)/)[1];
		o.parentNode.parentNode.currentSection = id;
		o.parentNode.parentNode.currentLink = o;
		sdtab.cssjs('add', o.parentNode, sdtab.activeClass);
		sdtab.changeTab(document.getElementById(id), 1);
		document.getElementById(id).focus();
		sdtab.cancelClick(e);
	},
/* helper methods */
	getTarget:function(e)
	{
		var target = window.event ? window.event.srcElement : e ? e.target : null;
		if (!target)
		{
			return false;
		}
		if (target.nodeName.toLowerCase() != 'a')
		{
			target = target.parentNode;
		}
		return target;
	},
	cancelClick:function(e)
	{
		if (window.event)
		{
			window.event.cancelBubble = true;
			window.event.returnValue = false;
			return;
		}
		if (e)
		{
			e.stopPropagation();
			e.preventDefault();
		}
	},
	addEvent: function(elm, evType, fn, useCapture)
	{
		if (elm.addEventListener) 
		{
			elm.addEventListener(evType, fn, useCapture);
			return true;
		}
		else if (elm.attachEvent)
		{
			var r = elm.attachEvent('on' + evType, fn);
			return r;
		}
		else
		{
			elm['on' + evType] = fn;
		}
	},
	cssjs:function(a, o, c1, c2)
	{
		switch (a)
		{
			case 'swap':
				o.className = !sdtab.cssjs('check', o, c1) ? o.className.replace(c2, c1) : o.className.replace(c1,c2);
			break;
			case 'add':
				if (!sdtab.cssjs('check', o, c1))
				{
					o.className += o.className ? ' ' + c1 : c1;
				}
			break;
			case 'remove':
				var rep = o.className.match(' ' + c1) ? ' ' + c1 : c1;
				o.className = o.className.replace(rep, '');
			break;
			case 'check':
				var found = false;
				var temparray = o.className.split(' ');
				for (var i = 0 ; i < temparray.length ; i++)
				{
					if (temparray[i] == c1)
					{
						found = true;
					}
				}
				return found;
			break;
		}
	}
}
sdtab.addEvent(window, 'load', sdtab.init, false);