title: Javascript extracting number from string
body: <p>I have a bunch of strings extracted from html using jQuery.</p>
  
  <p>They look like this:</p>
  
  <pre><code>var productBeforePrice = "DKK 399,95";
  var productCurrentPrice = "DKK 299,95";
  </code></pre>
  
  <p>I need to extract the number values in order to calculate the price difference.</p>
  
  <p>(So I wend up with ≈ </p>
  
  <pre><code>var productPriceDiff = DKK 100";
  </code></pre>
  
  <p>or just:</p>
  
  <p><code>var productPriceDiff = 100";</code>)</p>
  
  <p>Can anyone help me do this?</p>
  
  <p>Thanks,
  Jakob</p>