Question

For some reason, IE9 is not running my JavaScript code onload when the browser is launched for the first time that session. It seems to only run onload after the user refreshes the page. It will also run the JavaScript when the debug console is open.

How do I make it so the JavaScript runs onload after the browser is open? Is this just a bug of IE9?

I’ll restate this so you understand: The code DOESN’T run if you go to the site after launching a new browser session. The code DOES run if you open the site in a new tab, or reload the page, or open the debug console

Here is the function I use to run my script onload (which works fine in NORMAL browsers):

(function (i) {
  var u = navigator.userAgent;
  var e = /*@cc_on!@*/
  false;
  var st = setTimeout;
  if (/webkit/i.test(u)) {
    st(function () {
      var dr = document.readyState;
      if (dr == "loaded" || dr == "complete") {
        i()
      } else {
        st(arguments.callee, 10);
      }
    }, 10);
  } else if ((/mozilla/i.test(u) && !/(compati)/.test(u)) || (/opera/i.test(u))) {
    document.addEventListener("DOMContentLoaded", i, false);
  } else if (e) {
    (function () {
      var t = document.createElement('doc:rdy');
      try {
        t.doScroll('left');
        i();
        t = null;
      } catch (e) {
        st(arguments.callee, 0);
      }
    })();
  } else {
    window.onload = i;
  }
})(init); //init is the function to call onload

Answer 1

Okay, I figured it out. It has to do with some weird way IE handles IF statements.

In my init function I had two IF statements, one which checked if a variable existed and then logged the value of that variable. The other which checked to see if the value of the same variable was equal to an arbitrary string.

After removing the first IF statement, everything seems to work properly. I also decided to use a different onload function which can be seen below:

if (document.addEventListener) {
    document.addEventListener('DOMContentLoaded', init, true);
} else if (document.all && !window.opera){ //Crude test for IE
//Define a "blank" external JavaScript tag
    document.write('<script type="text/javascript" id="contentloadtag" defer="defer" src="javascript:void(0)"><\/script>');
    var contentloadtag=document.getElementById("contentloadtag");
    contentloadtag.onreadystatechange=function(){
        if (this.readyState=="complete") {
            init();
            //ie('open');
        }
    }
}