js只能输入数字

$("#SeatCount, #Charge").on("keyup", function () {
        if (this.value.replace(/^0|D/g, '') === "") {
            this.style.border = "1px solid red";
        } else {
            this.style.border = "";
        }
    });

keyup 与change事件会有兼容性问题，在手机上。

http://www.cnblogs.com/deng02/archive/2009/12/08/1619576.html

http://skyfar666.iteye.com/blog/894837

正则表达式

http://www.cnblogs.com/Mainz/archive/2009/03/14/1411359.html

http://www.oschina.net/question/12_9507