title: "Object doesn't support this property or method" when setting an object property in IE8
body: <p>I'm trying to make draggable elements without using jQuery. I'd like it to be compatible with IE8. The following breaks at <code>this.handle = {</code> with the error, "Object doesn't support this property or method."</p>
  
  <p>Does IE9&lt; have some goofy hang-up when it comes to setting object properties?</p>
  
  <pre><code>var Draggable = function(el){
    this.el = el;
    this.el.style.left = "0px";
    this.el.style.top = "0px";
    this.origin = {};
  
    this.handle = {
      drag: this.drag.bind(this),
      move: this.move.bind(this)
    };
  
    this.events = {
      start: new Listener(this.el, ["mousedown", "touchstart"], this.handle.drag),
      move: {},
      end: {}
    };
  }
  Draggable.prototype = {
    drag: function(evt){
      this.origin.left = parseInt(this.el.style.left) - evt.clientX;
      this.origin.top = parseInt(this.el.style.top) - evt.clientY;
      this.events.move = new Listener(window, ["mousemove", "touchmove"], this.handle.move);
      this.events.end = new Listener(window, ["mouseup", "touchend"], this.drop.bind(this));
    },
    move: function(evt){
      this.el.style.left = this.origin.left + evt.clientX + "px";
      this.el.style.top = this.origin.top + evt.clientY + "px";
    },
    drop: function(){
      this.events.move.stopListening();
    }
  }
  </code></pre>