<script><![CDATA[
	zk.afterLoad('zul.inp', function() {
		var xComboWidget = {};
		zk.override(zul.inp.ComboWidget.prototype, xComboWidget ,{
			_doKeyDown: function (evt) {
				var keyCode = evt.keyCode,
					bOpen = this._open;
				if ((evt.target == this || !(evt.target.$instanceof(zul.inp.InputWidget) || evt.target.$instanceof(zul.wgt.Checkbox)))// Bug ZK-475
						&& (keyCode == 9 || (zk.webkit && keyCode == 0))) { //TAB or SHIFT-TAB (safari)
					if (bOpen) this.close({sendOnOpen: true});
					return;
				}
	
				if (evt.altKey && (keyCode == 38 || keyCode == 40)) {//UP/DN
					if (bOpen) this.close({sendOnOpen: true});
					else this.open({sendOnOpen: true});
	
					//FF: if we eat UP/DN, Alt+UP degenerate to Alt (select menubar)
					var opts = {propagation: true};
					if (zk.ie < 11) opts.dom = true;
					evt.stop(opts);
					return;
				}
	
				//Request 1537962: better responsive
				if (bOpen && (keyCode == 13 || keyCode == 27)) { //ENTER or ESC
					if (keyCode == 13) this.enterPressed_(evt);
					else this.escPressed_(evt);
					return;
				}
	
				if (keyCode == 18 || keyCode == 27 || keyCode == 13
				|| (keyCode >= 112 && keyCode <= 123)) //ALT, ESC, Enter, Fn
					return; //ignore it (doc will handle it)
	
				if (this._autodrop && !bOpen)
					this.open({sendOnOpen: true});
	
				if (keyCode == 38) this.upPressed_(evt);
				else if (keyCode == 40) this.dnPressed_(evt);
				else this.otherPressed_(evt);
			}
		});//zk.override
	});//zk.afterLoad
	]]></script>