How to get a php variable in a javascript code?

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Drupal

Hi, I am working on drupal for few weeks and I can't find a solution for this problem.

I made a variable_set($name,$value) in a form. The form is a checkbox and is used to activate or desactivate a slideshow. I have a js variable called active and I want to put the value of variable_get($name) in it. Here is my js code:

(function($) {
  $(document).ready(function(){
      var slidePause = 7000;
      var active = 0;

      if (active == 0){
        $('#big-slider').bxSlider({
         auto: true,
         controls: false,
         autoDirection: 'prev',
         autoStart:true,
         pause: slidePause
        });
        $('#little-slider').bxSlider({
         displaySlideQty: 3,
         moveSlideQty: 1,
         auto: true,
         controls: false,
         autoStart:true,
         pause: slidePause
        });
      }
      else { 
      $('#big-slider').bxSlider({
         auto: true,
         controls: false,
         autoDirection: 'prev',
         autoStart:false,
         pause: slidePause
        });
        $('#little-slider').bxSlider({
         displaySlideQty: 3,
         moveSlideQty: 1,
         auto: true,
         controls: false,
         autoStart:false,
         pause: slidePause
        });
      }
  });
}(jQuery));