javascript - Fade elements in on scroll with Jquery -

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i creating timeline of events on website, , trying each element (with class '.event') fade in scroll down through timeline. having issues - fade in @ same time rather individually.

any ideas why? in advance! 

$(document).ready(function() {  /* every time window scrolled ... */ $(window).scroll( function(){      /* check location of each desired element */     $('.event').each( function(i){          var bottom_of_object = $(this).position().top + $(this).outerheight();         var bottom_of_window = $(window).scrolltop() + $(window).height();          /* if object visible in window, fade it */         if( bottom_of_window > bottom_of_object ){              $(this).animate({'opacity':'1'},500);          }      });   });

});

based on jsfiddle seems linked styling and/or markup issue.

here's updated version of jsfiddle works code , markup: http://jsfiddle.net/2ymn4/2/. messes layout little bit, might need rethink structure, points in right direction. main change got started working switching .event class relatively positioned. removing second .posts-timeline article , .posts div.

.event {     position: relaive;     opacity: 0;     left: 50%;     width: 210px;     z-index: 100;     min-height: 100px; }

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