function getCookieStyleSheet(){


	var cookie = readCookie("style");

	var title = cookie ? cookie : getPreferredStyleSheet();

	setActiveStyleSheet(title);

}




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
			saveActiveStyle();
		};
       
     }
   }
}

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;
}


function getPreferredStyleSheet() {
  return "medium";
}

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 saveActiveStyle(){

	var title = getActiveStyleSheet();
	createCookie("style", title, 365);

}

  
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);
}