/*
 DOMtab Version 3.1415927
 Updated March the First 2006
 written by Christian Heilmann
 check blog for updates: http://www.wait-till-i.com
 free to use, not free to resell
 */

domtab = {
	tabClass : 'domtab', // class to trigger tabbing
	listClass : 'domtabs', // class of the menus
	activeClass : 'active', // class of current link
	contentElements : 'div', // elements to loop through
	backToLinks : /#top/, // pattern to check "back to top" links
	printID : 'domtabprintview', // id of the print all link
	showAllLinkText : 'show all content', // text for the print all link
	prevNextIndicator : 'doprevnext', // class to trigger prev and next links
	prevNextClass : 'prevnext', // class of the prev and next list
	prevLabel : 'previous', // HTML content of the prev link
	nextLabel : 'next', // HTML content of the next link
	prevClass : 'prev', // class for the prev link
	nextClass : 'next', // class for the next link
	init : function() {
		var temp;
		if (!document.getElementById || !document.createTextNode) {
			return;
		}
		var tempelm = document.getElementsByTagName('div');
		for (var i = 0; i < tempelm.length; i++) {
			if (!domtab.cssjs('check', tempelm[i], domtab.tabClass)) {
				continue;
			}
			domtab.initTabMenu(tempelm[i]);
			domtab.removeBackLinks(tempelm[i]);
			if (domtab.cssjs('check', tempelm[i], domtab.prevNextIndicator)) {
				domtab.addPrevNext(tempelm[i]);
			}
			domtab.checkURL();
		}
		if (document.getElementById(domtab.printID) && !document.getElementById(domtab.printID).getElementsByTagName('a')[0]) {
			var newlink = document.createElement('a');
			newlink.setAttribute('href', '#');
			domtab.addEvent(newlink, 'click', domtab.showAll, false);
			newlink.onclick = function() {
				return false;
			}// safari hack
			newlink.appendChild(document.createTextNode(domtab.showAllLinkText));
			document.getElementById(domtab.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;
		parentMenu.getElementsByTagName(domtab.contentElements)[0].style.display = 'none';
		domtab.cssjs('remove', parentMenu.getElementsByTagName('a')[0].parentNode, domtab.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;
				domtab.cssjs('add', links[i].parentNode, domtab.activeClass);
				break;
			}
		}
		domtab.changeTab(elm, 1);
		elm.focus();
		cur.currentLink = links[i];
		cur.currentSection = loc;
	},
	showAll : function(e) {
		document.getElementById(domtab.printID).parentNode.removeChild(document.getElementById(domtab.printID));
		var tempelm = document.getElementsByTagName('div');
		for (var i = 0; i < tempelm.length; i++) {
			if (!domtab.cssjs('check', tempelm[i], domtab.tabClass)) {
				continue;
			}
			var sec = tempelm[i].getElementsByTagName(domtab.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 (!domtab.cssjs('check', tempelm[i], domtab.prevNextClass)) {
				continue;
			}
			tempelm[i].parentNode.removeChild(tempelm[i]);
			i--;
		}
		domtab.cancelClick(e);
	},
	addPrevNext : function(menu) {
		var temp;
		var sections = menu.getElementsByTagName(domtab.contentElements);
		for (var i = 0; i < sections.length; i++) {
			temp = domtab.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 (!domtab.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 (domtab.cssjs('check', lists[i], domtab.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)) {
				domtab.addEvent(links[i], 'click', domtab.showTab, false);
				links[i].onclick = function() {
					return false;
				}// safari hack
				domtab.changeTab(document.getElementById(id), 0);
			}
		}
		id = links[0].href.match(/#(\w.+)/)[1];
		if (document.getElementById(id)) {
			domtab.changeTab(document.getElementById(id), 1);
			thismenu.currentSection = id;
			thismenu.currentLink = links[0];
			domtab.cssjs('add', links[0].parentNode, domtab.activeClass);
		}
	},
	createPrevNext : function() {
		// this would be so much easier with innerHTML, darn you standards fetish!
		var temp = document.createElement('ul');
		temp.className = domtab.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 = domtab.prevLabel;
		temp.getElementsByTagName('li')[0].className = domtab.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 = domtab.nextLabel;
		temp.getElementsByTagName('li')[1].className = domtab.nextClass;
		domtab.addEvent(temp.getElementsByTagName('a')[0], 'click', domtab.navTabs, false);
		domtab.addEvent(temp.getElementsByTagName('a')[1], 'click', domtab.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 = domtab.getTarget(e);
		var menu = li.parentNode.parentNode.menu;
		var count = li.parentNode.parentNode.i;
		var section = menu.getElementsByTagName(domtab.contentElements);
		var links = menu.getElementsByTagName('a');
		var othercount = (li.parentNode.className == domtab.prevClass) ? count - 1 : count + 1;
		section[count].style.display = 'none';
		domtab.cssjs('remove', links[count].parentNode, domtab.activeClass);
		section[othercount].style.display = 'block';
		domtab.cssjs('add', links[othercount].parentNode, domtab.activeClass);
		var parent = links[count].parentNode.parentNode;
		parent.currentLink = links[othercount];
		parent.currentSection = links[othercount].href.match(/#(\w.+)/)[1];
		domtab.cancelClick(e);
	},
	changeTab : function(elm, state) {
		do {
			elm = elm.parentNode;
		} while(elm.nodeName.toLowerCase()!=domtab.contentElements)
		elm.style.display = state == 0 ? 'none' : 'block';
	},
	showTab : function(e) {
		var o = domtab.getTarget(e);
		if (o.parentNode.parentNode.currentSection != '') {
			domtab.changeTab(document.getElementById(o.parentNode.parentNode.currentSection), 0);
			domtab.cssjs('remove', o.parentNode.parentNode.currentLink.parentNode, domtab.activeClass);
		}
		var id = o.href.match(/#(\w.+)/)[1];
		o.parentNode.parentNode.currentSection = id;
		o.parentNode.parentNode.currentLink = o;
		domtab.cssjs('add', o.parentNode, domtab.activeClass);
		domtab.changeTab(document.getElementById(id), 1);
		document.getElementById(id).focus();
		domtab.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 = !domtab.cssjs('check', o, c1) ? o.className.replace(c2, c1) : o.className.replace(c1, c2);
				break;
			case 'add':
				if (!domtab.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;
		}
	}
}
domtab.addEvent(window, 'load', domtab.init, false);