title: Replace one property in CSS styles
body: <p>I have body with style</p>
  
  <p><code>background: url('hereSomeImg')</code></p>
  
  <p>And when i do</p>
  
  <p><code>document.body.style.background = 'url(../img/apple_true.jpg)'</code></p>
  
  <p>Other styles doesn't work. Here is only background . 
  How i can save them ?</p>