var blackandwhite = false;

(function($)
{
$(document).ready(function() {
	$('#util-nav-wrapper .size-switch').after('<div id="bw"><img width="16" height="14" title="Black and white version" alt="Black and white version" src="/images/_common/icons/bw_1.gif" /></div>');
	$('#bw').click(function()
	{
		var c = (!blackandwhite) ? 0 : 1;
		switchStyleBW(c);
		createCookie('style', c, 365);
		return false;
	})
	var c = readCookie('style');
	if (c) switchStyleBW(parseInt(c));
});

function switchStyleBW(bw)
{
	var _bw = (bw===0) ? false : true;
	$('link[rel*=style][title]').each(function(i) 
	{
		if (this.getAttribute('title').indexOf('blackandwhite')!=-1) {
			this.disabled = _bw;
			bw = (!_bw) ? 1 : 0;
			blackandwhite = (bw===1) ? true : false;			
			bwIcon = (bw===1) ? '/images/_common/icons/bw_2.gif' :'/images/_common/icons/bw_1.gif';
			bwText = (bw===1) ? 'Colored Version' :'Black and white version';
			$('#bw img').attr('src', bwIcon).attr('alt', bwText);
		}
	});		
}
})(jQuery);


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);
}