class - jQuery selector id not recognized issue -

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    <div class="ground">             <div class="row">                 <div class="box" id="block1">&nbsp;</div>                 <div class="box" id="block2">&nbsp;</div>                 <div class="box" id="block3">&nbsp;</div>                 <div class="box" id="block4">&nbsp;</div>             </div>         </div>

this html.

$(document).ready(function(){     $('#block1').click(function(){     $(this).slideup();     }); });

this script. here, trying make division id thing when clicked. however, simple code won't work.

when put div "block1" id outside div class=ground, works ok. whenever put in inside other tags, selector not recognize id , nothing happens when click it.

to knowledge id should recognized regardless of belongs, isn't it?


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