javascript - Removing css class from element when visible in container -

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i have following html containers:

<div id="holder">     <div class="element new">content</div>     <div class="element new">content</div>     <div class="element new">content</div>     <div class="element new">content</div>     <div class="element new">content</div>     <div class="element new">content</div>     <div class="element new">content</div>     <div class="element new">content</div>     <div class="element new">content</div>     <div class="element new">content</div>     <div class="element new">content</div>     <div class="element new">content</div>     <div class="element new">content</div>     <div class="element new">content</div>     <div class="element new">content</div> </div>

the holder container has max-height of 300px. element containers have average height of 50px. task remove "new" class 1 element container @ time whenever container hits top of holder container. have tried several ways javascript , jquery none of them working. here current function

$(document).ready(function() {     $('#holder').scroll(function() {         var s = $(".element");         s.each(function() {             var pos = s.position();             var windowpos = $('holder').scrolltop();             if (windowpos >= pos.top & windowpos <=100) {                 s.removeclass("new");             }         });     }); });

the problem is, remove class of element containers. there way remove class element hits top of holder container?

if correctly understand question, should solve it:

$(document).ready(function() {     $('#holder').scroll(function() {         var s = $(".new");         s.each(function(index, element) {             var pos = $(element).position();             var windowpos = $('#holder').scrolltop();             if (windowpos >= pos.top & windowpos <=100) {                 $(s[0]).removeclass("new");             }         });     }); });

another problem was, forgot # before holder.





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