是否可以使用JQUERY阻止某个字符或一组字符进入文本框或任何输入字段? [英] Is it possible to block a certain character or group of characters from entering into text box or any input field using JQUERY?

问题描述

我有一个文本输入字段，例如文本框或文本区域. 我想防止用户输入某些字符或一组字符. 例如，如果我不想要#* @和0-9的数字，则表示这些字符. 因此，每当用户按下以上任何一个字符键时，该字符都不应出现在输入字段中. 这意味着直接屏蔽该字符.

I have a text input field like text box or text area. I want to prevent the user from entering certain character or a group of characters. That is for example if I dont want # * @ and numbers from 0-9 these characters. So Whenever user press any of the above character key then that character should not appear in to an input field. It means directly blocking that character.

在Jquery中这可能吗? 请给我一些指导以实现它.

Is this possible in Jquery? Please give me some guidelines to achive it.

谢谢

推荐答案

以下内容仅允许在ID为"myTextBoxID"的文本框中输入字母字符.

The following will allow only alpha characters in a text box with the ID "myTextBoxID".

$("#myTextBoxID").bind("keypress", function(evt) 
    { 
        var charCode = (evt.which) ? evt.which : window.event.keyCode;  

        if (charCode <= 13) 
        { 
            return true; 
        } 
        else 
        { 
            var keyChar = String.fromCharCode(charCode); 
            var re = /[a-zA-Z]/ 
            return re.test(keyChar); 


 } 
}

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