/**
* Stylesheet toggle variation on styleswitch stylesheet switcher.
* Built on jQuery.
* Under an CC Attribution, Share Alike License.
* By Kelvin Luck ( http://www.kelvinluck.com/ )
**/
(function($)
	{
		
		// Local vars for toggle
		var availableStylesheets = [];
		var activeStylesheetIndex = 0;
		
		// To loop through available stylesheets
		$.stylesheetToggle = function()
		{
			activeStylesheetIndex ++;
			activeStylesheetIndex %= availableStylesheets.length;
			$.stylesheetSwitch(availableStylesheets[activeStylesheetIndex]);
		};
		
		// To switch to a specific named stylesheet
		$.stylesheetSwitch = function(styleName)
		{
			$('link[@rel*=style][title]').each(
				function(i) 
				{
					this.disabled = true;
					if (this.getAttribute('title') == styleName) {
						this.disabled = false;
						activeStylesheetIndex = i;
					}
				}
			);
			createCookie('style', styleName, 365);
		};
		
		// To initialise the stylesheet with it's 
		$.stylesheetInit = function()
		{
			$('link[rel*=style][title]').each(
				function(i) 
				{
					availableStylesheets.push(this.getAttribute('title'));
				}
			);
			var c = readCookie('style');
			if (c) {
				$.stylesheetSwitch(c);
			}
		};
	}
)(jQuery);
// cookie functions http://www.quirksmode.org/js/cookies.html
function createCookie(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=/";
}
function readCookie(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;
}
function eraseCookie(name)
{
	createCookie(name,"",-1);
}
// /cookie functions
//CUSTOM INIT AND TOGGLERS***************************
$(function(){					
	// Call stylesheet init so that all stylesheet changing functions 
	// will work.
	$.stylesheetInit();
	//Get the stylesheet in the clients browser and set the rel in the link based on this
	var cookieStyle = readCookie('style');					
	if(cookieStyle == "contrast"){
		$('#switch-link').attr('rel', 'standard');
		$('#switch-link-img').attr('src', '/includes/images/text_normal.gif');
		$('#switch-link-img').attr('onmouseover', 'this.src=\'/includes/images/text_normal_over.gif\';');
		$('#switch-link-img').attr('onmouseout', 'this.src=\'/includes/images/text_normal.gif\';');
	}
	else{
		$('#switch-link').attr('rel', 'contrast');
		$('#switch-link-img').attr('src', '/includes/images/text_contrast.gif');
		$('#switch-link-img').attr('onmouseover', 'this.src=\'/includes/images/text_contrast_over.gif\';');
		$('#switch-link-img').attr('onmouseout', 'this.src=\'/includes/images/text_contrast.gif\';');
	}
	// When one of the styleswitch links is clicked then switch the stylesheet to
	// the one matching the value of that links rel attribute.
	$('.styleswitch').bind(
		'click',
		function(e)
		{
			if(this.getAttribute('rel') == 'contrast'){
				this.setAttribute('rel', 'standard');
				$.stylesheetSwitch("contrast");
				document.getElementById('switch-link-img').setAttribute('src', '/includes/images/text_normal.gif');
				document.getElementById('switch-link-img').setAttribute('onmouseover', 'this.src=\'/includes/images/text_normal_over.gif\';');
				document.getElementById('switch-link-img').setAttribute('onmouseout', 'this.src=\'/includes/images/text_normal.gif\';');
			}
			else{
				this.setAttribute('rel', 'contrast');
				$.stylesheetSwitch("standard");
				document.getElementById('switch-link-img').setAttribute('src', '/includes/images/text_contrast.gif');
				document.getElementById('switch-link-img').setAttribute('onmouseover', 'this.src=\'/includes/images/text_contrast_over.gif\';');
				document.getElementById('switch-link-img').setAttribute('onmouseout', 'this.src=\'/includes/images/text_contrast.gif\';');
			}
			return false;
		}
	);
});