function setActiveStyleSheet(title,onload) {
  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;
	  document.getElementById('toggle_'+a.getAttribute("title")).src='/wp-content/themes/balancemedia/images/change.theme.off.gif';
      if(a.getAttribute("title") == title) { 
      	a.disabled = false;
      	document.getElementById('toggle_'+title).src='/wp-content/themes/balancemedia/images/change.theme.on.gif';
      	document.getElementById('bgimage').src='/wp-content/themes/balancemedia/images/'+title+'.bkg.jpg';
      }
    }
  }
  if (!onload) {
	  createCookie("balancemediastyle", title, 7*24);
  }
}

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;
  var randomnumber=Math.floor(Math.random()*5)
  switch(randomnumber) {
  	case 1:
  		return 'themeB';
  	case 2:
  		return 'themeC';
  	case 3:
  		return 'themeD';
  	case 4:
  		return 'themeE';
  	case 5:
  		return 'themeF';
  	case 0:
  	default:
  		return 'themeA';
  }
}

function createCookie(name,value,hours) {
  if (hours) {
    var date = new Date();
    date.setTime(date.getTime()+(hours*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("balancemediastyle");
  if (cookie) {
  	var title = cookie;
  } else {
  	var title = getPreferredStyleSheet();
  	createCookie("balancemediastyle", title, 1);
  }
  setActiveStyleSheet(title,true);
}

/*window.onunload = function(e) {
  var title = getActiveStyleSheet();
  createCookie("balancemediastyle", title, 7*24);
}

var cookie = readCookie("balancemediastyle");
var title = cookie ? cookie : getPreferredStyleSheet();
setActiveStyleSheet(title);
*/