function setActiveStyleSheetSize(size) {
  var i, a;
  
  var activeSheet = getActiveStyleSheet();
  var option = "blue";
  if (activeSheet) {
	  var parts = activeSheet.split("_");
	  if (parts.length == 2) {
		  option = parts[1];
	  }
  }
  
  title = size + "_" + option;
  setActiveStyleSheet(title);
}

function setActiveStyleSheetOption(option) {
	
  var activeSheet = getActiveStyleSheet();
  var size;
  if (activeSheet) {
	  size = activeSheet.split("_")[0];
  } else {
	  size = "small";
  }

  var title = size + "_" + option;
  setActiveStyleSheet(title);
}

function setActiveStyleSheet(title) {
	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;
			}
		}
	}
}

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 getActiveStyleSheetOption() {
	
	var activeSheet = getActiveStyleSheet();
	var currentOption = "blue";
	if (activeSheet) {
		var parts = activeSheet.split("_");
		if (parts.length == 2) {
			currentOption = parts[1];
		}
	}
	
	return currentOption;
}

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);
}

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