Cut & Paste Check if its a number

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Cut & Paste Check if its a number (Require NS 4.x or IE 4.x)

Credit: JavaScript Kit

Description: This script checks the contents of a form box to ensure that its a number (updated to accept demicals). If not, the submission of the form is canceled, and the surfer prompted to re-enter a valid number. This script requires NS 4.x or IE 4.x to function-all other browsers will simply not participate in the number checking.

Example:

Directions: Simply cut and paste the below code into the <body> section of your page. It
contains a form with one box that is checked for "number validity". You can add in more form elements into the form, as you would with any other form.

<form name="checknum" onSubmit="return checkban()"> Please enter your age:<br> <input type="text" name="pnum"> <input type="submit" value="Submit"> </form> <script language="JavaScript1.2"> /*Number check script- By JavaScript Kit (www.javascriptkit.com) Over 200 free scripts here! */ function checknumber(){ var x=document.checknum.pnum.value var anum=/(^\d+$)|(^\d+\.\d+$)/ if (anum.test(x)) testresult=true else{ alert("Please input a valid number!") testresult=false } return (testresult) } </script> <script> function checkban(){ if (document.layers||document.all||document.getElementById) return checknumber() else return true } </script> <p align="center"><font face="arial" size="-2">This free script provided by</font><br> <font face="arial, helvetica" size="-2"><a href="http://javascriptkit.com">JavaScript Kit</a></font></p>

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