JavaScript DHTML/Form Control/Formatted TextField

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Allowing Only Numbers into a Text Box

   <source lang="html4strict">

/* JavaScript Bible, Fourth Edition by Danny Goodman John Wiley & Sons CopyRight 2001

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<HTML> <HEAD> <TITLE>Letting Only Numbers Pass to a Form Field</TITLE> <SCRIPT LANGUAGE="JavaScript"> function checkIt(evt) {

   evt = (evt) ? evt : window.event
   var charCode = (evt.which) ? evt.which : evt.keyCode
   if (charCode > 31 && (charCode < 48 || charCode > 57)) {
       status = "This field accepts numbers only."
       return false
   }
   status = ""
   return true

} </SCRIPT> </HEAD> <BODY>

Letting Only Numbers Pass to a Form Field


<FORM onSubmit="return false"> Enter any positive integer: <INPUT TYPE="text" NAME="numeric"

   onKeyPress="return checkIt(event)">

</FORM> </BODY> </HTML>


      </source>