// JavaScript Document
  var ieBrowser=(navigator.userAgent.indexOf("MSIE")!=-1);

  function selectOnchangeHandler()
  {
    window.document.frmCatSelect.submit();
  }

  //window.document.getElementById("cat_id").onchange=selectOnchangeHandler;
	

	var num_slides=0;
  var alpha=0;
  var speed=0.1;
	var intervalSpeed=10;
  var intervalId=0;
	var imgid=0;
  function fadeIn()
  {
	  alpha+=speed;
		
		if(alpha<=10)
		{
		  if(ieBrowser)
  	    window.document.getElementById('image'+imgid).style.filter = 'alpha(opacity=' + alpha*10 + ')';
		  else
    	  window.document.getElementById('image'+imgid).style.opacity = alpha/10;
		}
		
  	if(alpha>=20)
	  {
	    clearInterval(intervalId);
  	  intervalId=0;
		  intervalId=setInterval("fadeOut()",intervalSpeed);
  	}
  }

  function fadeOut()
  {
	  alpha-=speed;
		if(alpha>=0)
		{
		  if(ieBrowser)
  	    window.document.getElementById('image'+imgid).style.filter = 'alpha(opacity=' + alpha*10 + ')';
		  else
    	  window.document.getElementById('image'+imgid).style.opacity = alpha/10;			
		}

    if(alpha<=0)
	  {
	    clearInterval(intervalId);
  	  intervalId=0;
	    alpha=0;
      window.document.getElementById('image'+imgid).style.display='none';
			if(imgid<num_slides-1)
			  imgid++;
			else
			  imgid=0;
				
			showSlide();
  	}
  }
	
  function showSlide()
  {
		if(alpha>10)
		  alpha=10;
		if(alpha<0)
		  alpha=0;
			
	  if(ieBrowser)
 	    window.document.getElementById('image'+imgid).style.filter = 'alpha(opacity=' + alpha*10 + ')';
	  else
   	  window.document.getElementById('image'+imgid).style.opacity = alpha/10;			
			
	  window.document.getElementById('image'+imgid).style.display='';
  	if(intervalId==0)
	  {
	    intervalId=setInterval("fadeIn()",intervalSpeed);
  	}
  }

  function hideSlide()
  {
	  window.document.getElementById('image').style.display='none';
  }
	

  function StartSlides()
	{
		try
		{
		num_slides=window.document.getElementById("num_slides").value;		
	  if(num_slides>0 && intervalId==0)
    {
			alpha=0;
	  	if(ieBrowser)
 		    window.document.getElementById('image'+imgid).style.filter = 'alpha(opacity=' + alpha*10 + ')';
		  else
   	  	window.document.getElementById('image'+imgid).style.opacity = alpha/10;						
	  	window.document.getElementById('image'+imgid).style.display='none';
		
			imgid=0;

	  	if(ieBrowser)
 		    window.document.getElementById('image'+imgid).style.filter = 'alpha(opacity=' + alpha*10 + ')';
		  else
   	  	window.document.getElementById('image'+imgid).style.opacity = alpha/10;						
	  	window.document.getElementById('image'+imgid).style.display='none';

	 	  showSlide();
		}
		}
		catch(err)
		{
		}
	}	
	
	function StopSlides()
	{
		if(intervalId!=0)
		{
			clearInterval(intervalId);
  	  intervalId=0;
		}		
	}

		
  function ContinueSlides()
	{
		
  	num_slides=window.document.getElementById("num_slides").value;		
	  if(num_slides>0)
	    showSlide();
	}