Advanced Search

Javascript Character input restriction script, with length limiter

/ Published in: JavaScript
Save to your folder(s)
Restricts the characters that are entered into a textbox. Also limits the length of the value to 5.

Expand | Embed | Plain Text

Copy this code and paste it in your HTML 
  1. function inputLimiter(e, allow, value) {
  2.         var AllowableCharacters = '';
  3.         if (allow == 'Letters') { AllowableCharacters = ' ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'; }
  4.         if (allow == 'Numbers') { AllowableCharacters = '1234567890'; }
  5.         if (allow == 'NameCharacters') { AllowableCharacters = ' ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz-.\''; }
  6.         if (allow == 'NameCharactersAndNumbers') { AllowableCharacters = '1234567890 ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz-\''; }
  7.         var k;
  8.         k = document.all ? parseInt(e.keyCode) : parseInt(e.which);
  9.         if (k != 13 && k != 8 && k != 0) {
  10.             if ((e.ctrlKey == false) && (e.altKey == false)) {
  11.                 return ((AllowableCharacters.indexOf(String.fromCharCode(k)) != -1) && (value.length < 5));
  12.             } else {
  13.                 return true;
  14.             }
  15.         } else {
  16.             return true;
  17.         }
  18.     }
  19.  
  20. <input type="text" onkeypress="return inputLimiter(event,'Numbers', this.value)" />

Report this snippet


Comments

RSS Icon Subscribe to comments

You need to login to post a comment.