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 • Allow the user to enter just AlphaNumeric values in TextBox
 • Check for Special characters
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 • FormFaces JavaScript
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Code Samples Java Script
 

Allow the user to enter just AlphaNumeric values in TextBox


Code ResourceAuthor: Kalidasan  

Difficulty Level: Beginner

Published: 13th Oct 2010   Read: 3782 times  

Filed in: Java Script
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The piece of code will help the user to enter only alphaNumeric Values in the text field. So that the user will never be allowed to enter special characters in the the text field provided.

 


Sample Code
  1. <html>
  2. <head>
  3. <script language="javaScript">
  4.  
  5. function fnAllowAlphaNumerics(e)
  6. {
  7.         var key;
  8.         if(window.event)
  9.                 key = window.event.keyCode;     //IE
  10.     else
  11.                 key = e.which;                  //Firefox
  12.      if ((key>47 && key<58) || (key>64 && key<91) || (key>96 && key<123) || key == 8 || key ==0)
  13.      {
  14.                 return true;
  15.      }
  16.      else
  17.      {
  18.                 return false;
  19.      }
  20. }
  21. </script>
  22. </head>
  23. <body>
  24. <form name="ValidateForm">
  25. Name:<input type="text" name="Name" id= "Name:" onkeypress = "return fnAllowAlphaNumerics(event);">
  26. </FORM>
  27. </body>
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