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Check if the input is digital use KeyCode match onkeypress Event

Source: Internet
Author: User
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Check whether the input is a number in this article using KeyCode with the onkeypress event to implement, specific examples such as the following

The code is as follows: <script language = "javascript" type = "Text/javascript" > Function check (event) {//The user presses a key each, to determine whether it is a number if (E vent.keycode<48 | | event.keycode>57) {Window.alert ("You are not typing a number!")  ");  return false; } </script> <body> <input type = "text" onkeypress = "return Check (event)"/> </body>

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