jquery length gives different values in chrome and firefox -

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i have div id="gallery", , 3 images within:

<div id="gallery">             <a class="trigger" href="images/fulls/01.jpg">             <img class="thumb" src="images/thumbs/01.jpg">             </a>             <a class="trigger" href="images/fulls/02.jpg">             <img class="thumb" src="images/thumbs/02.jpg">             </a>             <a class="trigger" href="images/fulls/03.jpg">             <img class="thumb" src="images/thumbs/03.jpg">             </a> </div>

so when $('#gallery img').length; value 3 in chrome, expected. but, in firefox value 51.

opera, safari, , internet explorer give 3 also.

here's fiddle link: http://jsfiddle.net/ncd9h/


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