title: How can I write a RegEx that only allows certain characters?
body: <p>I'm writing a small script (similar to SO's tag RegEx) that only allows the following characters: <code>[a-z 0-9 + # - .]</code> But I can't figure out the right syntax:</p>
  
  <p>I've come up with this:</p>
  
  <p><code>ReReplace(myString, "[A-Z]", "", "ALL")</code> which removes capital letters. I'm not sure how to include the special characters in the expression, however.</p>
  
  <p>The <a href="http://help.adobe.com/en_US/ColdFusion/9.0/CFMLRef/WSc3ff6d0ea77859461172e0811cbec22c24-7e98.html" rel="nofollow">ReReplace()</a> I'm using is a ColdFusion function.</p>