Procurar item na tela

encontrar algum elemento usando o JQuery

by André Albson

HTML

<div class="conteudo">
<li class="show-more">
<a> if found selected then add to this</a>
<ul>
<li><a> sub-menu</a></li>
  <div class="caixa"><div class="teste">opa</div></div>
<li><a class=""> sub-menu</a></li>
<li><a> sub-menu</a></li>
</ul>
</li>
  </div>

JavaScript

var $aSelected = $('div.conteudo').find('div');

if( $aSelected.hasClass('caixa') ){
  alert( 'FOUND' );
  $('div.caixa').addClass('selected');
}else{
  alert( 'NOT FOUND' );
}