A JavaScript text-decoration:blink implementation

/*

  "text-decoration:blink" usually is the horror for any webpage

  See http://theworldsworstwebsiteever.com/ for a demonstration.

  There is an exception where I found it reasonable:
  I had the requirement of a countdown which should start to blink during its final 30 seconds.
  This makes sense to me.

  I use the CSS class
    .blink {
       text-decoration:blink;
       }

  which doesn't work for IE, Chrome and Safari, however.

  For basic JS-DOM functions I am using minlib.js ( see http://ruediger-plantiko.net/minlib/ )


*/
      function Blinker(e) {
        this.e = getElement(e);
        var theBlinker = this;
        this.id = window.setInterval( function() {
          theBlinker.blink();
          }, Blinker.interval );
        }
      Blinker.prototype.blink = function() {
        var visibility = this.e.style.visibility;
        if (this.e.className.match(/\bblink\b/)) {
          this.e.style.visibility = (visibility == "hidden") ? "" : "hidden";
          }
        else {
          this.stop();
          }
        };
      Blinker.prototype.stop = function() {
        this.e.style.visibility = "";
        window.clearInterval( this.id );
        };
      Blinker.interval = 700;

// Buttons for test page, setting and resetting the "blink" class
      function setBlinker(e) {
        setClass(byId("test"),"blink");
        if (navigator.userAgent.match(/MSIE|Chrome|Safari/)) {
// Need a Blinker instance as soon as the new class is set
          new Blinker("test");
          }
        }
      function resetBlinker(e) {
        resetClass(byId("test"),"blink");
        }

      function doOnLoad() {
        registerFor( byId("setBlink"), "click", setBlinker );
        registerFor( byId("resetBlink"), "click", resetBlinker );
        }