// ----------------------------------------------
// StyleSwitcher functions written by Paul Sowden
// http://www.idontsmoke.co.uk/
// - - - - - - - - - - - - - - - - - - - - - - -
// For the details:
// http://www.alistapart.com/stories/alternate/
// ----------------------------------------------

function setActiveStyleSheet(title_in) {
  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_in)
      	a.disabled = false;
    }
    title = title_in;
  }
  
  // change size of Picts
  var pic_array = new Array("printer", "top", "close");
   for(i = 0; i < pic_array.length; i++) {
   	if(document.getElementsByName(pic_array[i])[0]){
   		if(title == 'Small Text')
   			document.getElementsByName(pic_array[i])[0].src = path + 'img/' + pic_array[i] + '_1_off.gif';
   		else if(title == 'Medium Text')
   			document.getElementsByName(pic_array[i])[0].src = path + 'img/' + pic_array[i] + '_2_off.gif';
   		else if(title == 'Large Text')
   			document.getElementsByName(pic_array[i])[0].src = path + 'img/' + pic_array[i] + '_3_off.gif';
   		}
   	}
}

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);
}

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