function escapeHTML(source) {
  return source.replace(/&/g,"&amp;").replace(/</g,"&lt;").replace(/>/g,"&gt;").replace(/[\r\n]/g,"<br/>");
}
var texts = [
  "is a web server running on Node.JS",
  "is written in JavaScript",
  "is free as in freedom!",
  "has an integrated log viewer",
  "can be expanded using mods",
  "can now run PHP-FPM through GreenRhombus mod!",
  "can now run JSGI through YellowSquare mod!"
];
function getRandomTextsIndex() {
  while(true) {
   var v = Math.floor(Math.random()*texts.length);
   if(texts.length > 0 && v != textsIndex) return v;
  }
}
var begtext = "SVR.JS ";
var textsIndex = 0;
var h1 = document.getElementsByTagName("h1")[0];
if(h1) {
  h1.innerHTML = "<span id=\"fancyheader\">" + escapeHTML(begtext + texts[textsIndex]) + "</span><span id=\"fancyhcursor\" style=\"user-select: none\">|</span>";
  var cursorActive = true;
  setInterval(function() {
     if(cursorActive) {
       document.getElementById("fancyhcursor").style.visibility = "visible";
     } else {
       document.getElementById("fancyhcursor").style.visibility = "hidden";
     }
     cursorActive = !cursorActive;
  }, 475);
  function timeoutFunction() {
     var partialText = texts[textsIndex];
     var newPartialText = null;
     var delay = 895 / partialText.length;
     var fancyHeader = document.getElementById("fancyheader");
     var doTyping = true;
     if (fancyHeader.getBoundingClientRect) {
       var bounding = fancyHeader.getBoundingClientRect();
       var headerHeight = 0;
       if (document.getElementsByClassName) {
         var hd = document.getElementsByClassName("header")[0];
         if(hd) {
           var hb = hd.getBoundingClientRect();
           headerHeight = Math.max(0, hb.height+hb.top);
         }
       }
       doTyping = (bounding.top >= -(fancyHeader.offsetHeight/2) + headerHeight && bounding.left >= -(fancyHeader.offsetWidth/2) && bounding.right <= (window.innerWidth || document.documentElement.clientWidth) + (fancyHeader.offsetWidth/2) && bounding.bottom <= (window.innerHeight || document.documentElement.clientHeight) + (fancyHeader.offsetHeight/2) - headerHeight);
     }
     if (doTyping) {
       h1.style["min-height"] = h1.offsetHeight + "px";
       var intervalBegin = setInterval(function () {
         if(partialText.length > 0) {
           partialText = partialText.substr(0,partialText.length-1);
           fancyHeader.innerHTML = escapeHTML(begtext + partialText);
         } else {
           textsIndex = getRandomTextsIndex();
           newPartialText = texts[textsIndex];
           delay = 895 / newPartialText.length;
           clearInterval(intervalBegin);
           var intervalEnd = setInterval(function () {
             if(partialText.length < newPartialText.length) {
               partialText = newPartialText.substr(0,partialText.length+1);
               fancyHeader.innerHTML = escapeHTML(begtext + partialText);
             } else {
               clearInterval(intervalEnd);
               h1.style["min-height"] = "0px";
               h1.style["min-height"] = null;
               setTimeout(timeoutFunction, 6250);
             }
           }, delay);
         }
       }, delay);
     } else {
       setTimeout(timeoutFunction, 6250);
     }
  }
  setTimeout(timeoutFunction, 6250);
}