/*
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;
        }
    }
}

function load() {
    domtab.addEvent(window, 'load', domtab.init, false);
}

load();