keypress事件

var textbox = document.forms[0].elements["textbox1"];

//文本框忽略所有输入的非数值
EventUtil.addHandler(textbox, "keypress", function(event) {
    event = EventUtil.getEvent(event);
    var target = EventUtil.getTarget(event);
    var charCode = EventUtil.getCharCode(event);

    if (!/\d/.test(String.fromCharCode(charCode)) && charCode > 9 && !event.ctrlKey) {
        EventUtil.preventDefault(event);
    }
});