title: Regular expression in jquery allow only one match
body: <p>Okay, i've got the following problem. I used jquery to test a string with a regular expression. It works all fine, but....</p>
  
  <p>In the Netherlands the zipcodes are 4 digits followed by 2 characters e.g. 1234AB.
  Now i use the following regex to find this: <code>[0-9]{4}[A-Z]{2}</code>.</p>
  
  <p>But when someone types 1234AB+948203848 for example. It also return true. And i don't want that! How can i make it return false when it's not 4 digits followed by 2 characters?</p>
  
  <p>Thanks in advance.</p>
  
  <p><strong><a href="http://jsbin.com/yaterogoya/1/watch" rel="nofollow">JSBIN</a></strong></p>