function setActiveStyleSheet(title) {
  if (title != 'null'){
  		if (title == 'v3m'){
        		document.styleSheets[1].disabled=true;
        		document.styleSheets[0].disabled=false;
        }else{
            //Alexander Henket: Fix added for Apple Safari
            /*
            document.styleSheets[0].disabled=true;
       		document.styleSheets[1].disabled=false;
            */
            if (document.styleSheets[0] != null) {
                 document.styleSheets[0].disabled=true;
            }
            if (document.styleSheets[1] != null) {
                 document.styleSheets[1].disabled=false;
            }
        }
  }
  showLinks(title);
}

function getActiveStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("name") && !a.disabled) return a.getAttribute("name");
  }
  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("name")
       ) return a.getAttribute("name");
  }
  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 showLinks(title){
	if (document.getElementsByName('v3mviewedits')){
		var viewedits = document.getElementsByName('v3mviewedits');
		var noedits = document.getElementsByName('v3m');
		if (title == 'v3m'){
			for (var i = 0; i < viewedits.length; i++) {
				viewedits[i].className = 'custombutton';
			}
			for (var i = 0; i < noedits.length; i++) {
				noedits[i].className = 'custombuttonhide';
			}
		}else{
			for (var i = 0; i < viewedits.length; i++) {
				viewedits[i].className = 'custombuttonhide';
			}
			for (var i = 0; i < noedits.length; i++) {
				noedits[i].className = 'custombutton';
			}
		}
	}		
}

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);
}

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