/*//////////////////////////////////////////////////////////
//
//  # Style Switcher
//
//  - Auth: Paul Sowden
//  - URL: http://www.alistapart.com/articles/alternate/
//  - 2011-07-13 (Wed)
//
//////////////////////////////////////////////////////////*/

function setActiveStyleSheet(title) {
	var i,a,main;
	for(i=0;(a=document.getElementsByTagName("link")[i]);i++) {
		if(a.getAttribute("rel").indexOf("style")!=-1&&a.getAttribute("title")) {
			a.disabled=true;if(a.getAttribute("title")==title)a.disabled=false;
		}
	}
	setTextSizeBtn(title);
}

function getActiveStyleSheet() {
	var i,a;
	for(i=0;(a=document.getElementsByTagName("link")[i]);i++) {
		if(a.getAttribute("rel").indexOf("style")!=-1&&a.getAttribute("title")&&!a.disabled)return a.getAttribute("title");
	}
	return null;
}

function getPreferredStyleSheet() {
	var i,a;for(i=0;(a=document.getElementsByTagName("link")[i]);i++) {
		if(a.getAttribute("rel").indexOf("style")!=-1&&a.getAttribute("rel").indexOf("alt")==-1&&a.getAttribute("title"))return a.getAttribute("title");
	}
	return null;
}

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 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;
}

window.onload=function(e) {
	var cookie=readCookie("style");var title=cookie?cookie:getPreferredStyleSheet();setActiveStyleSheet(title);
}

window.onunload=function(e) {
	var title=getActiveStyleSheet();createCookie("style",title,365);
}

function setTextSizeBtn(name) {
	if(document.getElementById("text_l")!=null) {
		if(name=="medium") {
			document.getElementById('text_m').className = "selected";
			document.getElementById('text_l').className = "";
		} else {
			document.getElementById('text_m').className = "";
			document.getElementById('text_l').className = "selected";
		}
	}
}

var cookie = readCookie("style");
var title  = cookie?cookie:getPreferredStyleSheet();
setActiveStyleSheet(title);