// IOTBS2.1 :: Invasion of the Body Switchers - Look Who's Switching Too
// >>> Core functions for all versions
// ***********************************************
// This copyright statement must remain in place for both personal and commercial use
// 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/
//************************************************
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'];
			
			for (var i=0; i<document.all.length; 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;
		}
		
		if (this.cookie == " noimages ")
		{
			document.getElementById("all").disabled = true;
		}
		else
		{
			document.getElementById("all").disabled = false;
		}
		
		return this.cookie;
};

switchManager.prototype.save = function(ident, chosen, ind, obj)
{
	if (chosen == "noimages")
	{
		document.getElementById("all").disabled = true;
	}
	else
	{
		document.getElementById("all").disabled = false;
	}

	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();