var gtitle = null;

function setActiveStyleSheet(title) {
	gtitle = 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;
    }
  }
}

function getActiveStyleSheet() {
	if (gtitle)
	{
		return gtitle;
	}
  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 getCurrentTitle(){
	var cookie = readCookie("style");
	return cookie ? cookie : getPreferredStyleSheet();
}
/*****************************************
				Font changer
******************************************/
var prefsLoaded = false;
var defaultFontSize = 76;
var currentFontSize = defaultFontSize;

function revertStyles(){

	currentFontSize = defaultFontSize;
	changeFontSize(0);

}

function changeFontSize(sizeDifference){
	currentFontSize = parseInt(currentFontSize) + parseInt(sizeDifference * 5);

	if(currentFontSize > 100){
		currentFontSize = 100;
	}else if(currentFontSize < 60){
		currentFontSize = 60;
	}
	setFontSize(currentFontSize);
};

function setFontSize(fontSize){
	var stObj = (document.getElementById) ? document.getElementById('content_area') : document.all('content_area');
	document.body.style.fontSize = fontSize + '%';
	
	//alert (document.body.style.fontSize);
};

/*******************************************************
				End font changer
*******************************************************/
function switchtheme(action){
	var title = getActiveStyleSheet();
	if (!title)
	{
		title = "dark_show";
	}
	var titlearr = title.split("_");
	switch (action) {
		case 'darkbright':
			if (titlearr[0] == 'dark')
			{
				titlearr[0] = 'bright';
			}else{
				titlearr[0] = 'dark';
			}
			if (titlearr[1] != 'show' && titlearr[1] != 'hide')
			{
				titlearr[1] = 'show';
			}
			break;
		case 'showhide':
			if (titlearr[1] == 'show')
			{
				titlearr[1] = 'hide';
			}else{
				titlearr[1] = 'show';
			}
			if (titlearr[0] != 'dark' && titlearr[0] != 'bright')
			{
				titlearr[0] = 'dark';
			}
			break;
	}
	title = titlearr[0] + "_" + titlearr[1];
	setActiveStyleSheet(title);
}

function setUserOptions(){
	if(!prefsLoaded){

		cookie = readCookie("fontSize");
		currentFontSize = cookie ? cookie : defaultFontSize;
		setFontSize(currentFontSize);		
		prefsLoaded = true;
	}

	setActiveStyleSheet(getCurrentTitle());
}
function saveSettings()
{
  var title = getActiveStyleSheet();
  createCookie("style", title, 365);
  createCookie("fontSize", currentFontSize, 365);
}

window.onload = setUserOptions;
window.onunload = saveSettings;