paste事件，只能paste数字

1 //getClipboardText
2 EventUtil.addHandler(textbox, "paste", function(event) {
3     event = EventUtil.getEvent(event);
4     var text = EventUtil.getClipboardText(event);
5 
6     if (!/^\d*$/.test(text)) {
7         EventUtil.preventDefault(event);
8     }
9 });