文本框的javascript在回发事件中仅接受数字 [英] javascript for textbox accept only numbers on postback event

问题描述

我正在使用仅允许输入数字的文本框..假设用户输入了一个字符..它必须警告消息框..我正在使用webappication开发项目.


问候
manohar

hi i am using a textbox to which only numbers are allowed..suppose a user enters a character..it must alert a messagebox.. i am doing a project in webappication


regards
manohar

推荐答案

不要警告任何东西.仅在客户端上执行此操作，并在onclick处理程序中，过滤掉除数字和退格键(字符代码8)以外的所有字符.

一种使用jQuery的简单方法.请参阅: http://www.thimbleopensource.com/tutorials-snippets/jquery-plugin -filter-text-input [ ^ ].

另请参见:
http://en.wikipedia.org/wiki/JQuery [ http://docs.jquery.com/Main_Page [

Don''t alert anything. Do it on the client side only and, in the onclick handler, filter out all characters except digits and backspace (which is character code 8).

One easy way of doing it by using jQuery. Please see: http://www.thimbleopensource.com/tutorials-snippets/jquery-plugin-filter-text-input[^].

See also:
http://en.wikipedia.org/wiki/JQuery[^],
http://docs.jquery.com/Main_Page[^].

—SA

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