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Js restrictions: Only English letters and numbers can be entered. Chinese characters and other special characters cannot be entered.

Source: Internet
Author: User
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Friends who are experienced in web development will strictly verify the forms entered by users. I would like to share with you some experience in Form Verification, how to use JavaScript to restrict the input box to only English letters and numbers, not Chinese and other special characters. For more information, see the following code!

<Html xmlns = "http://www.phpernote.com/javascript-function/742.html"> 

The following describes the common events of onkeypress, onkeyup, and onblur:


The onkeypress event occurs when the keyboard key is pressed and a key is released.


The onkeyup event occurs when the keyboard button is released.


The onblur event occurs when the object loses focus.
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Related Keywords:
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