html - setting width of div jquery -

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i'm trying set width of div using jquery.

this how i'm trying set size of div 

$('#page').css("width",data[0]['imagewidth']);

and div i'm trying set 

<div id="page">  </div>

any appreciated

in css lengths require unit, in case pixel (px):

$('#page').css("width",data[0]['imagewidth'] + "px");

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