Return which image from a vertical list is currently in the viewport with jQuery? -


i have vertical list of images user scrolls view. how can make jquery tell me image in viewport?

here fiddle close want. http://jsfiddle.net/y6pjg/

what change border if image more 30 pixels top. want change if statement check position bottom.

$(document).ready(function() {     // check on page load     docheck();     // check on scroll     $(window).scroll(function(){         docheck();     });  });  function docheck(){     $('#list li').each(function(index){         var item = $(this);         if((item.offset().top - $(window).scrolltop()) > 30){             item.css('border-style', 'solid');         }else{             item.css('border-style', 'none');         }     }); }

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