mousedown handler, start the dragging
var t = this.domNode; dojo.style(t,"cursor","move"); this._x = e.pageX; this._y = e.pageY; if ((this._x < t.offsetLeft + t.clientWidth) && (this._y < t.offsetTop + t.clientHeight)) { dojo.setSelectable(t,false); this._mover = dojo.connect(t,"onmousemove",this,"_move"); }