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Strip non-numeric characters using JavaScript

Summary: Strip non-numeric characters using JavaScript and Regular Expressions.
 
Keywords: EXPRESSION
JAVASCRIPT
NUMBER
NUMERIC
REG
REGEXP
REGULAR
REGULAR EXPRESSIONS
Applicable Software: JavaScript
 
Body:

One of the best thing things you can do, when programming, is validate user input. This can save you all kinds of headache in the long run - problems with database inserts/updates, problem with SQL Injection, problems with variables types not being what you expect.

In this article, I am going to show you how to take a string and return just the numbers from it. Stripping all alphabetical and symbols from it. 

function stripAlphaChars(pstrSource) 
{ 
var m_strOut = new String(pstrSource); 
    m_strOut = m_strOut.replace(/[^0-9]/g, ''); 

    return m_sOut; 
}

 
Author: Douglas L. Setzer, II, http://www.27seconds.com
Posted On: 6/4/2002 7:59:03 AM

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