code: function(pixel, callback) {
  			if (!this._clientDiv) { return; }
  			this._scrollViewAnimated(0, Math.max(0, pixel) - this._getScroll().y, callback);
  		}
docs: Sets the top pixel.
  <p>
  The top pixel is the pixel position that is currently at
  the top edge of the view.  This position is relative to the
  beginning of the document.
  </p>
  
  @param {Number} pixel the top pixel.
  @param {Function} [callback] if callback is specified and <code>scrollAnimation</code> is not zero, view scrolling is animated and
  the callback is called when the animation is done. Otherwise, callback is callback right away.
  
  @see orion.editor.TextView#getBottomPixel
  @see orion.editor.TextView#getTopPixel
  @see orion.editor.TextView#convert