陳沛鴻 Human practices photoartwork-795289567 image fade

From 2014hs.igem.org

$(document).ready(function() {

 // execute the slideShow, set 4 seconds (4000) for each image
 slideShow(4000);

});

function slideShow(speed) {

 // append an 'li' item to the 'ul' list for displaying the caption

$('ul.slideshow').append('

</li>');

 // set the opacity of all images to 0
 $('ul.slideshow li').css({opacity: 0.0});
 
 // get the first image and display it
 $('ul.slideshow li:first').css({opacity: 1.0}).addClass('show');
 
 // get the caption of the first image from the 'rel' attribute and display it
 $('#slideshow-caption p').html($('ul.slideshow li.show').find('img').attr('alt'));
   
 // display the caption
 $('#slideshow-caption').css({opacity: 0.6, bottom:0});
 
 // call the gallery function to run the slideshow  
 var timer = setInterval('gallery()',speed);
 
 // pause the slideshow on mouse over
 $('ul.slideshow').hover(
   function () {
     clearInterval(timer); 
   },  
   function () {
     timer = setInterval('gallery()',speed);     
   }
 );

}

function gallery() {

 //if no images have the show class, grab the first image
 var current = ($('ul.slideshow li.show')?  $('ul.slideshow li.show') : $('#ul.slideshow li:first'));

 // trying to avoid speed issue
 if(current.queue('fx').length == 0) {

   // get the next image, if it reached the end of the slideshow, rotate it back to the first image
   var next = ((current.next().length) ? ((current.next().attr('id') == 'slideshow-caption')? $('ul.slideshow li:first') :current.next()) : $('ul.slideshow li:first'));
     
   // get the next image caption
   var desc = next.find('img').attr('alt');  
 
   // set the fade in effect for the next image, show class has higher z-index
   next.css({opacity: 0.0}).addClass('show').animate({opacity: 1.0}, 1000);
   
   // hide the caption first, and then set and display the caption
   $('#slideshow-caption').slideToggle(300, function () { 
     $('#slideshow-caption p').html(desc); 
     $('#slideshow-caption').slideToggle(500); 
   });   
 
   // hide the current image
   current.animate({opacity: 0.0}, 1000).removeClass('show');

}