/* This script and many more are available free online at
The JavaScript Source!! http://javascript.internet.com
Created by: Corneliu Lucian 'Kor' Rusu | corneliulucian[at]gmail[dot]com */
var r={
  'special':/[\W]/g,
  'quotes':/['\''&'\"']/g,
  'notnumbers':/[^\d]/g
}

function valid(o,w){
  o.value = o.value.replace(r[w],'');
}