add: this._keyboardInput.focus(); 
context: Timeline._Band.prototype._onMouseUp = function(innerFrame, evt, target) {    this._dragging = false;};
meta: 4232	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/4232/6eecb6a63f20551084335a2ba3ce689361931c1f/timeline.js/buggy/src/main/webapp/api/scripts/timeline.js