Jquery: How to get the siblings with css property set to display none

HI ,

<ul>
<li id=tab1 style="display:none;">tab1</li>
<li id=tab2 style="display:block;">tab2</li>
<li id=tab3 style="display:block;">tab3</li>
<li id=tab4 style="display:block;">tab4</li>
<li id=tab5 style="displa开发者_C百科y:block;">tab5</li>
<li id=tab6 style="display:none;">tab6</li>
</ul>

I want to get siblings of tab5 with css property display none, how can i get it

$('#tab5').siblings().is(':visible');

is not working , Thanks

$('#tab5').siblings(":hidden");