在javascript中不允许在文本框中单独使用特殊字符 [英] Not allow special character alone in textbox in javascript

问题描述

我有一个单独的字母数字和特殊字符的文本框。但我不应该只允许特殊角色。我如何在JavaScript中限制这个？



我尝试过：

I Have one text box which is alone Alphanumeric and special character. But i should not allow Special character alone. How Can i restrict this in JavaScript?

What I have tried:

i should not allow Special character alone. How Can i restrict this in JavaScript

推荐答案

function blockSpecialKey(e)
{
var k;
document.all ? k = e.keyCode : k = e.which;
return ((k > 64 && k < 91) || (k > 96 && k < 123) || k == 8 || k == 32 || (k >= 48 && k <= 57));
}

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