// JavaScript Document
function MM_reloadPage(init) {  //reloads the window if Nav4 resized
  if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
    document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
  else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
}
MM_reloadPage(true);

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function ToggleDisplay(id)  {
    var elem = document.getElementById(id);
    if (elem){
      if (elem.style.visibility != 'visible') {
        elem.style.display = 'block';
        elem.style.visibility = 'visible';
      } else {
        elem.style.display = 'none';
        elem.style.visibility = 'hidden';
      }
    }
}

// --- preloadUsersettings
function loadUsersettings(){
    changeFontsize(0); 
    
    var cookie = getCookie("style");
    var title //= cookie ? cookie : getPreferredStyleSheet();
    if (cookie){
        title = cookie;
    }else{
        title = getPreferredStyleSheet();
    }

    setActiveStyleSheet(title);
}

// --------------  Font-size
function getCookie(name){
  var cname = name + "=";
  var dc = document.cookie;
  if (dc.length > 0) {
    begin = dc.indexOf(cname);
    if (begin != -1) {
      begin += cname.length;
      end = dc.indexOf(";", begin);
      if (end == -1) end = dc.length;
        return unescape(dc.substring(begin, end));
    }
  }
  return null;
}

// setting a cookie
function setCookie(name, value, expires, path, domain, secure) {
  document.cookie = name + "=" + escape(value) +
  ((expires == null) ? "" : "; expires=" + expires.toGMTString()) +
  ((path == null) ? "" : "; path=" + path) +
  ((domain == null) ? "" : "; domain=" + domain) +
  ((secure == null) ? "" : "; secure");
}

// deleting a cookie
function delCookie (name,path,domain) {
  if (getCookie(name)) {
    document.cookie = name + "=" +
    ((path == null) ? "" : "; path=" + path) +
    ((domain == null) ? "" : "; domain=" + domain) +
    "; expires=Thu, 01-Jan-70 00:00:01 GMT";
  }
}

var firstCall = true;
var fontUnit = "%";
var fontStartSize = 80;

function changeFontsize(increment) {
  if (firstCall) {
    firstCall = false;
    var oldFontSize = getCookie('fontSize');
    if(oldFontSize){
        document.body.style.fontSize = oldFontSize + fontUnit;
    }else{
        document.body.style.fontSize = fontStartSize + fontUnit;
    }
 }
 if (document.getElementsByTagName) {
    var newFontSize;
    currentFontSize = Number(document.body.style.fontSize.substring(0,document.body.style.fontSize.length - fontUnit.length));
    newFontSize = currentFontSize + increment;
    document.body.style.fontSize = newFontSize + fontUnit;
    setCookie('fontSize', newFontSize);
  }
}

/* kontrastview */
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;
    }
  }
  setCookie("style", title);

    // switch the switcher
    var elem, elem2;
    elemKontrast = document.getElementById("KontrastSwitcher");
    elemNormal = document.getElementById("FarbSwitcher");
    if (elemKontrast && elemNormal){
        if(title == "normal"){
            elemNormal.style.display = "none";
            elemKontrast.style.display = "block";
        }else{
            elemNormal.style.display = "block";
            elemKontrast.style.display = "none";
        }
    }
}

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");
        }else{
        }
  }
  return null;
}