var sliderIntervalId = 0;
var sliderWidth = 437;
var sliding = false;
var slideSpeed = 15;

function Slide()
{
   if(sliding)
      return;
   sliding = true;
   if(sliderWidth == 437)
      sliderIntervalId = setInterval('SlideUpRun()', 30);
   else
      sliderIntervalId = setInterval('SlideDownRun()', 30);
}

function SlideUpRun()
{
   slider = document.getElementById('FullSlider');
   if(sliderWidth <= 55)
   {
      sliding = false;
      sliderWidth = 55;
      slider.style.width = '55px';
      clearInterval(sliderIntervalId);
   }
   else
   {
      sliderWidth -= slideSpeed;
      if(sliderWidth <55)
         sliderWidth = 55;
      slider.style.width = sliderWidth + 'px';
   }
}

function SlideDownRun()
{
   slider = document.getElementById('FullSlider');
   if(sliderWidth>= 437)
   {
      sliding = false;
      sliderWidth = 437;
      slider.style.width = '437px';
      clearInterval(sliderIntervalId);
   }
   else
   {
      sliderWidth += slideSpeed;
      if(sliderWidth> 437)
         sliderWidth = 437;
      slider.style.width = sliderWidth + 'px';
   }
}