title: Filter out numbers out of a text using regular expressions in javascript
body: <p>What will be the best way using javascript regular expression to get numbers out of text..
  e.g.... I have "$4,320 text/followme" and I want to get 4320 out of this. However I want to avoid numbers after first occourance of an alphabet or any non alphabet other than a comma ','</p>
  
  <p>so that if i have $4,320 t234ext/followme  it will still return me 4320.
  The input will always have $ sign at the beginning</p>
  
  <p>so the regular expression should return </p>
  
  <pre><code> $4,320 text/followme          returns  4320
   $4,320 t3444ext/followme      return   4320
   $4,320 /followme              return   4320
   $4320 text/followme           return   4320
   $4320 t3444ext/followme       return   4320
   $4320 /follow4me              return   4320
  </code></pre>