如何使用Jquery限制文本框中的字母和特殊字符? [英] How to restrict alphabets and special characters in a text box using Jquery?

问题描述

有人可以告诉我如何使用jquery将字母和特殊字符(不包括-")限制到文本框中吗?

Can someone please show me how to restrict alphabets and special characters excluding ''-'' into a text box using jquery?

推荐答案

Wes Aday和我自己的问题.我可以建议发现这种解决方案的另一种方法:阅读键盘事件的原始jQuery文档.特别要注意return false如何作为默认事件处理的阻止程序在事件处理程序上工作: http://api.jquery.com /keypress [^ ].

此jsFiddle显示了一个完整的解决方案: http://jsfiddle.net/ExceptionLimeCat/cmfNj [

Please see the comments to the question by Wes Aday and myself. I could suggest one more method of finding out such solutions: read original jQuery documentation of keyboard events. In particular, pay attention how return false works on an event handler, as a blocker of default event handling: http://api.jquery.com/keypress[^].

This jsFiddle shows a complete solution: http://jsfiddle.net/ExceptionLimeCat/cmfNj[^].

—SA

<pre lang="cs">function allowOnlyNumber(eventInstance) {
          eventInstance = eventInstance || window.event;
          key = eventInstance.keyCode || eventInstance.which;
          if ((47 < key) && (key < 58) || key == 8 || key == 189 || key == 109) {
              return true;
          } else {
              if (eventInstance.preventDefault)
                  eventInstance.preventDefault();
              eventInstance.returnValue = false;
              return false;
          }
      }

我试过了.

I tried this which worked.

这篇关于如何使用Jquery限制文本框中的字母和特殊字符?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！