// ---------------------------------------------------------
// Set Active Style Sheet
// ---------------------------------------------------------
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")) {
      if(a.getAttribute("title") == title) {
				a.disabled = false;
			} else {
				a.disabled = true;
			}

    }
  }
  createCookie('style', title, 365);
	//alert("Active Style Sheet : "+ title);
}

// ---------------------------------------------------------
//  Get Active Style Sheet
// ---------------------------------------------------------
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;
}

// ---------------------------------------------------------
//  Get Preferred Style Sheet
// ---------------------------------------------------------
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) {
	//alert("Name:"+name+"\nValue:"+value+"\nDays:"+days+"\n");
  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) {
	   //alert("Cookie Value : "+c.substring(nameEQ.length,c.length));
		return c.substring(nameEQ.length,c.length);
	}
  }
  return null;
}

// ---------------------------------------------------------
//   On Load - Get Preferred Style Sheet, Set Active Style Sheet
// ---------------------------------------------------------
window.onload = function(e) {
  var cookie = readCookie("style");
  var title = cookie ? cookie : getPreferredStyleSheet();
  setActiveStyleSheet(title);
}

// ---------------------------------------------------------
// On Unload - Get Active Style Sheet, Create Cookie
// ---------------------------------------------------------
window.onunload = function(e) {
  var title = getActiveStyleSheet();
  createCookie("style", title, 365);
}

// ---------------------------------------------------------
//  Read Cookie, Get Preferred Style Sheet

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