title: Switching between two background color with one button using javascript
body: <p>I have a problem with my website. I would like to cycle in two different backgrund colors with one button (from white to black and from black to white) Another thing which I want to is to change font color with the same button (from black to white and from white to black. The reason why I want this is that I want to make negative version of my website with a button click. Can somebody post me the script and the button html tag?</p>
  
  <p>The background color and the font color is defined with these tags in CSS:</p>
  
  <p>body {color: $(body.text.color); background: $(body.background);}</p>
  
  <p>So the script should change this values, I thing.</p>
  
  <p>Thanks for help.</p>