// JavaScript Document
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;

		var oImg = document.getElementById(a.getAttribute("title"));
		if(oImg != null){
			var src = oImg.getAttribute('src');
			var pos1 = src.indexOf("_o");
			var pos2 = src.lastIndexOf(".");
			if(a.getAttribute("title") == title){
				oImg.onmouseout = null;
				//alert('9');
				if(pos1 < 0){
					oImg.setAttribute('src', src.substring(0, pos2) + "_o" + src.substring(pos2));
				}
				oImg.className = null;
			}
			else{
				if(pos1 >= 0){
					oImg.setAttribute('src', src.substring(0, pos1) + src.substring(pos2));
				}
				oImg.className = "imgover";
				oImg.onmouseover = function() {
					this.setAttribute('src', this.getAttribute('hsrc'));
				}

				oImg.onmouseout = function() {
					this.setAttribute('src', this.getAttribute('src').replace('_o.', '.'));
				}
			}
		}
    }
  }
}

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;
}

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

window.onload = function(e) {
	var title = getActiveStyleSheet();
	var oImg = document.getElementById(title);
	if(oImg != null){
		var src = oImg.getAttribute('src');
		var pos = src.lastIndexOf(".");
		if(pos >= 0){
			oImg.setAttribute('src', src.substring(0, pos) + "_o" + src.substring(pos));
			oImg.className = "";
			oImg.setAttribute('hsrc', oImg.getAttribute('src'));
			//alert('7');
		}
	}
}

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

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