var dom1=(document.getElementById)?1:0;
var ie4plus=(document.all)?1:0;
var ns4=(document.layers)?1:0;

function getElementRef(id){
	if (dom1) return document.getElementById(id);
	else if (ie4plus) return document.all[id];
	//else if (ns4) return document.layers[id];
	else return null;
}

function textResizeLinks(at){
	lglink=getElementRef('lgtxtlink');
	smlink=getElementRef('smtxtlink');
	if(lglink){
		if(!lglink.style)return;
		if(at=='min'){
			smlink.style.color="#c8c8c8";
			smlink.style.cursor="default";
			lglink.style.color="#000000";
			lglink.style.cursor="pointer";
		}else if(at=='max'){
			smlink.style.color="#000000";
			smlink.style.cursor="pointer";
			lglink.style.color="#c8c8c8";
			lglink.style.cursor="default";
		}else{
			smlink.style.color="#000000";
			smlink.style.cursor="pointer";
			lglink.style.color="#000000";
			lglink.style.cursor="pointer";
		}
	}
}

function testResizeLinksOnload(){
	if(getActiveStyleSheet()){
		var currStyle=getActiveStyleSheet();
		if(currStyle=='A--')textResizeLinks('min');
		else if(currStyle=='A++')textResizeLinks('max');
		else textResizeLinks('reg');		
	}
}

function fontsizeup() {
  active = getActiveStyleSheet();
  switch (active) {
    case 'A--' : 
      setActiveStyleSheet('A-');
      break;
    case 'A-' : 
      setActiveStyleSheet('A');
      break;
    case 'A' : 
      setActiveStyleSheet('A+');
      break;
    case 'A+' : 
      setActiveStyleSheet('A++');
      break;
    case 'A++' :
      break;
    default :
      setActiveStyleSheet('A--');
      break;
  }
}

function fontsizedown() {
  active = getActiveStyleSheet();
  switch (active) {
    case 'A++' : 
      setActiveStyleSheet('A+');
      break;
    case 'A+' : 
      setActiveStyleSheet('A');
      break;
    case 'A' : 
      setActiveStyleSheet('A-');
      break;
    case 'A-' : 
      setActiveStyleSheet('A--');
      break;
    case 'A--' : 
       break;
    default :
      setActiveStyleSheet('A--');
      break;
  }
}

function setActiveStyleSheet(title) {
  if(ns4)return;
  if(!document.getElementsByTagName) return;
  var i, a, main;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("alternate style") != -1 && a.getAttribute("title")) {
      a.disabled = true;
      if(a.getAttribute("title") == title) {
	  	a.disabled = false;
		//alert("active="+title)
	  }
    }
	if(title=='A--')textResizeLinks('min');
	else if(title=='A++')textResizeLinks('max');
	else textResizeLinks('reg');
  }
  createCookie("style", title, 365);//added by LO@FM to quickly update cookie on stylechange -- to help popups get correct stylesheet
}

function getActiveStyleSheet() {
  if(ns4)return;
  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() {
  return ('A--');
}

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) {
  if(ns4)return;
  var title = getActiveStyleSheet();
  createCookie("style", title, 365);
}

var cookie = readCookie("style");
var title = cookie ? cookie : getPreferredStyleSheet();
if (title == 'null') {
  title = getPreferredStyleSheet();
}

setActiveStyleSheet(title);