How do I pass a variable to function

How do I pass a variable to function

Hi I am creating a testimonial/quote rotator using the following function:
$(document).ready(function(){
$('#testimonials .slide');
 setInterval(function(){
  $('#testimonials .slide').filter(':visible').fadeOut(500,function(){
   if($(this).next('div.slide').size()){
    $(this).next().fadeIn(500);
   }
   else{
   $('#testimonials .slide').eq(0).fadeIn(500);
   }
  });
},20000);   
});

That reefers to:

<div id="testimonials">

<Div class="slide">
<p class="quote">Quote one here.</p>
</Div>

<Div class="slide">
<p class="quote">Quote two here.</p>
</Div>

</Div>

I would like if possible to set a different time interval (currently 20000 for all) for each quote, how can I pass a value from the html to the function?

I am as you have probably already guessed new to jQuery, any help greatly appreciated.