/*--------------------------------------------------------------------
 * Copyright (c) 2009 Vision Master Designs
 * Licensed under GPL (http://www.opensource.org/licenses/gpl-license.php)

 * JQuery Plugin : "Switch Stylesheets"
 * Author : Michael (http://www.visionmasterdesigns.com)
 * Version : 1.0
 * Description : Based on the superb stylesheet switcher plugin by By Kelvin Luck ( http://www.kelvinluck.com/ ).
                 Can create multiple groups of alternate stylesheets to change
                 
Ex :
Alternate Stylesheets :
<!-- alternate css for colors -->
<link href="green.css" type="text/css" rel="alternate stylesheet" title="green-color" />
<link href="blue.css" type="text/css" rel="alternate stylesheet" title="blue-color" />

JS Code :
<script type="text/javascript">
$(document).ready(function(){ 
    $(".changecolor").switchstylesheet( { seperator:"color"} );
});
</script>

Usage :
<a href="#" class="changecolor" title="red-color">Red</a> |
<a href="#" class="changecolor" title="green-color">Green</a> |
<a href="#" class="changecolor" title="blue-color">Blue</a>

------------------------------------------------------------------------*/

$.fn.switchstylesheet = function(options) {

	// default vals
	defaults = {
		seperator : 'alt'
	};

	var options = $.extend(defaults, options);

	// read the style
	var c = cookie.readCookie(options.seperator);
	if (c)
		switchss(c);

	// goes thru the links to find out the ones having the selector
	$(this).click(function(e) {
		e.preventDefault();
		switchss($(this).attr('name'));
	});

	function switchss(title) {
		//console.debug('looking for: ' + title);
		// goes thru all the styles having seperator
		$('link[rel*=style][title*=' + options.seperator + ']').each(function(i) {
			this.disabled = true;
			if ($(this).attr('title') == title) {
				this.disabled = false;
			}
		});
		// create a cookie to store the style
		cookie.createCookie(options.seperator, title, 365);
	}
};

// cookie functions
var cookie;
(function($) {
	cookie = {
		createCookie : function(name, value, days) {
			if (days) {
				var date = new Date();
				date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
				var expires = "; expires=" + date.toGMTString();
			} else
				var expires = "";
			document.cookie = name + "=" + value + expires + "; path=/";
		},

		readCookie : function(name) {
			var nameEQ = name + "=";
			var ca = document.cookie.split(';');
			for ( var i = 0; i < ca.length; i++) {
				var c = ca[i];
				while (c.charAt(0) == ' ')
					c = c.substring(1, c.length);
				if (c.indexOf(nameEQ) == 0)
					return c.substring(nameEQ.length, c.length);
			}
			return null;
		}
	};
})(jQuery);