// GNU General Public License -- http://www.gnu.org/copyleft/gpl.html
// Original concept by Andy Clarke -- http://www.stuffandnonsense.co.uk/
// DOM scripting by brothercake -- http://www.brothercake.com/
// Create element and attributes based on a method by beetle -- http://www.peterbailey.net/
function iotbs() { //open initialisation function
//initialise the preferences manager ('canvas-element', 'path-for-load-mode')
var switcher = new switchManager('body', '');

/*****************************************************************************
 Define switching controls
*****************************************************************************/

//create a new switcher control ('container-id', 'label', 'is-native-switcher', '"selected" text')
var screenSwitcher = new bodySwitcher('screen-switcher', '', 'no', '');

//add a new class option ('classname', 'label')
screenSwitcher.defineClass('default', 'Normal contrast');
screenSwitcher.defineClass('high', 'High contrast');

var textSwitcher = new bodySwitcher('text-switcher', '', 'no', '');
textSwitcher.defineClass('smallest', 'Smallest text size');
textSwitcher.defineClass('smaller', 'Smaller text size');
textSwitcher.defineClass('medium', 'Medium text size');
textSwitcher.defineClass('larger', 'Larger text size');
textSwitcher.defineClass('largest', 'Largest text size');

}; //close initialisation function


/*****************************************************************************
 Core functions
*****************************************************************************/

var switcher;function switchManager(canvas, path){switcher = this;this.canvas = canvas == 'body' && typeof document.body != 'undefined' ? document.body : document.getElementsByTagName(canvas)[0];this.initial = this.canvas.className;if(this.initial == ''){this.initial = 'itobs';}this.path = (typeof path != 'undefined' && path != '' ? path : null);this.itoken = /(\:\[[0-9]+\])/;if(this.path != null){this.tokenrefs = ['', -1];this.linkeles = document.getElementsByTagName('link');}this.master = null;this.string  = '';this.idstring = '';this.isop = typeof window.opera != 'undefined';this.isie = typeof window.attachEvent != 'undefined' && !this.isop;this.iskde = navigator.vendor == 'KDE';this.cookie = this.read();if(this.cookie != null){this.string = this.cookie;if(this.path == null){this.canvas.className = this.initial + this.string;}for(var i=0; i<this.idcookie.length; i++){this.idstring += this.idcookie[i][0] + '=' + this.idcookie[i][1] + '&';if(this.path != null){this.linkele = document.getElementById(this.idcookie[i][0] + '-stylesheet');if(this.linkele != null){if(this.tokenrefs[0] == this.idcookie[i][0]){this.alternates = [this.linkele];var inscope = false;var len = this.linkeles.length;for(var j=0; j<len; j++){if(this.linkeles[j] == this.alternates[0]){inscope = true;var ind = j;}else if(inscope && (this.linkeles[j].getAttribute('rel') == null || !/(alternat)(iv)?(e stylesheet)/i.test(this.linkeles[j].rel))){inscope = false;this.linkeles[this.tokenrefs[1] + ind].disabled = false;break;}if(inscope && this.linkeles[j].getAttribute('rel') != null && /(stylesheet)/i.test(this.linkeles[j].rel) && this.linkeles[j].getAttribute('title') != null && this.linkeles[j].title != ''){this.linkeles[j].disabled = true;}}}else{this.linkele.href = this.path + this.idcookie[i][0] + '-' + this.idcookie[i][1] + '.css';}}}}}if(typeof window.attachEvent != 'undefined'){window.attachEvent('onunload', function(){var closures = ['onchange', 'onclick', 'onkeydown', 'checker'];var numLoops = Math.min(document.all.length, 2000);for(var i=0; i<numLoops; i++){for(var j=0; j<closures.length; j++){document.all[i][closures[j]] = null;}}});}};switchManager.prototype.set = function(days){var thedate = new Date();thedate.setTime(thedate.getTime() + ( days *24*60*60*1000));var info = this.idstring;if(info == '') { thedate.setTime(0); }document.cookie = 'bodySwitcherKV=' + info+ '; expires=' + thedate.toGMTString()+ '; path=/';};switchManager.prototype.read = function(){this.cookie = null;if(document.cookie && document.cookie.indexOf('bodySwitcherKV=')!=-1){this.idcookie = [];this.cookie = document.cookie.split('bodySwitcherKV=')[1].split(';')[0].split('&');var tmp = '', len = this.cookie.length;for(var i=0; i<len; i++){this.cookie[i] = this.cookie[i].split('=');if(this.cookie[i].length > 1){if(this.path != null && this.itoken.test(this.cookie[i][1])){this.tokenrefs = [this.cookie[i][0],parseInt(this.cookie[i][1].split(':[')[1], 10)];}this.cookie[i][1] = this.cookie[i][1].replace(this.itoken, '');tmp += ' ' + this.cookie[i][1] + ' ';this.idcookie[i] = this.cookie[i];}}this.cookie = tmp;}return this.cookie;};switchManager.prototype.save = function(ident, chosen, ind, obj){this.ident = ident;this.idstring = this.idstring.replace(this.ident + '=', '');var len = obj.classes.length;for(var i=0; i < len; i++){this.string = this.string.replace(' ' + obj.classes[i] + ' ','');var reg = new RegExp('(' + obj.classes[i] + ')' + '(\:\[[0-9]+\])?' + '&', '');this.idstring = this.idstring.replace(reg,'');}if(chosen != 'default'){this.string += ' ' + chosen + ' ';this.idstring += this.ident + '=' + chosen;if(this.master == obj){this.idstring += ':[' + ind + ']';}this.idstring +=  '&';}if(this.path != null){if(this.master != obj){var linkele = document.getElementById(this.ident + '-stylesheet');if(linkele != null){var sheetpath = this.path + this.ident + '-' + chosen + '.css';if(this.isop){setTimeout(function() { linkele.href = sheetpath; }, 10);}if(this.isie){var request = new ActiveXObject('Microsoft.XMLHTTP');request.onreadystatechange = function(){if(request.readyState == 4 && /(200|304)/.test(request.status.toString())){linkele.href = '';linkele.href = sheetpath;}};request.open('GET', sheetpath, true);request.send(null);}linkele.href = sheetpath;}}else{len = this.alternates.length;for(i=0; i<len; i++){this.alternates[i].disabled = i != ind;}}}else{this.canvas.className = this.initial + this.string;}this.set(365);};switchManager.prototype.integrate = function(obj, divid){this.master = obj;this.alternates = [document.getElementById(divid + '-stylesheet')];var inscope = false;var len = this.linkeles.length;for(var i=0; i<len; i++){if(i > 0 && this.linkeles[i - 1] == this.alternates[0]){inscope = true;}if(inscope){if(this.linkeles[i].getAttribute('title') != null && this.linkeles[i].getAttribute('rel') != null && /(alternat)(iv)?(e stylesheet)/i.test(this.linkeles[i].rel)){this.alternates[this.alternates.length] = this.linkeles[i];}else{inscope = false;break;}}}var isenabled = 0;var watcher = window.setInterval(function(){var len = switcher.alternates.length;for(var i=0; i<len; i++){if(!switcher.alternates[i].disabled){if(i != isenabled){isenabled = i;obj.update(i);switcher.save(divid, switcher.alternates[i].href.split(divid + '-')[1].split('.css')[0], i, obj );}break;}}},55);};switchManager.prototype.create = function(tag, attrs){var ele = (typeof document.createElementNS != 'undefined') ? document.createElementNS('http://www.w3.org/1999/xhtml',tag) : document.createElement(tag);if(typeof attrs != 'undefined'){for(var i in attrs){switch(i){case 'text' :ele.appendChild(document.createTextNode(attrs[i]));break;case 'class' :ele.className = attrs[i];break;case 'for' :ele.setAttribute('htmlFor',attrs[i]);break;default :ele.setAttribute(i,'');ele[i] = attrs[i];break;}}}return ele;};function domReady(){this.n = typeof this.n == 'undefined' ? 0 : this.n + 1;if(typeof document.getElementsByTagName != 'undefined' && (document.getElementsByTagName('body')[0] != null || document.body != null)){if(!(typeof document.all != 'undefined' && typeof window.opera == 'undefined' && typeof document.mimeType == 'undefined' && typeof window.sidebar == 'undefined')){iotbs();}}else if(this.n < 60){setTimeout('domReady()', 250);}};domReady();

/*****************************************************************************
 Generates the switching controls as definition-lists and links
*****************************************************************************/

function bodySwitcher(divid, label, isnative, selected){if(switcher.path != null && !switcher.isie && typeof isnative != 'undefined' && isnative == 'yes'){switcher.integrate(this, divid );}this.classes = [];if(document.getElementById(divid) == null) { return false; }this.labels = [];var attrs = { 'id' : 'select-' + divid };this.dl = document.getElementById(divid).appendChild(switcher.create('dl', attrs));attrs = { 'text' : label };this.dl.appendChild(switcher.create('dt', attrs));this.selected = typeof selected != 'undefined' ? selected : '';return true;};bodySwitcher.prototype.defineClass = function(key, val){this.classes[this.classes.length] = key;if(typeof this.dl == 'undefined') { return false; }var self = this;this.labels[this.labels.length] = val;var item = this.dl.appendChild(switcher.create('dd'));item.className = 'selected';if(key == 'default'){var link = item.appendChild(document.createTextNode(val + this.selected));}else if(switcher.cookie != null && switcher.cookie.indexOf(' ' + key + ' ')!=-1){link = item.appendChild(document.createTextNode(val + this.selected));if(key != 'default'){var defitem = this.dl.childNodes[1];defitem.className = '';this.dl.childNodes[1].removeChild(defitem.firstChild);var attrs = { 'href' : 'javascript:void("' + this.classes[0] + '", "' + this.labels[0] + '")', 'text' : this.labels[0] };link = defitem.appendChild(switcher.create('a', attrs));}}else{item.className = '';attrs = { 'href' : 'javascript:void("' + key + '", "' + val + '")', 'text' : val };link = item.appendChild(switcher.create('a', attrs));}item.onclick = function(){if(this.getElementsByTagName('a').length == 0) { return false; }var items = self.dl.getElementsByTagName('dd');var len = items.length;for(var i=0; i<len; i++){if(items[i] == this){var ind = i;break;}}switcher.save(self.dl.id.replace('select-', ''), self.classes[ind], ind, self );self.redraw(ind, this);return true;};return true;};bodySwitcher.prototype.redraw = function(ind, link){var items = this.dl.getElementsByTagName('dd');var len = items.length;for(var i=0; i<len; i++){if(items[i].firstChild.nodeName == '#text'){items[i].className = '';items[i].removeChild(items[i].firstChild);var attrs = { 'href' : 'javascript:void("' + this.classes[i] + '", "' + this.labels[i] + '")', 'text' : this.labels[i] };items[i].appendChild(switcher.create('a', attrs));}}items[(ind == len - 1 ? 0 : ind + 1)].firstChild.focus();link.removeChild(link.firstChild);link.appendChild(document.createTextNode(this.labels[ind] + this.selected));items[ind].className = 'selected';};bodySwitcher.prototype.update = function(ind){if(typeof this.dl != 'undefined'){this.redraw(ind, this.dl.getElementsByTagName('dd')[ind]);}};