y does animate method in jQuery do not support display property? and many more properties of CSS?

y does animate method in jQuery do not support display property? and many
more properties of CSS?

<div id="content">
<div id="ev1" class="evnt_imgs"><img src="images/e1.jpg" /> </div>
<div id="ev11" class="evnt_desc">this text is purely related to
event</div></div>
$('#ev11').animate({height:'auto',width:'100%',borderRadius:'20px',display:'block'},600);
ev11.style.margin="auto";
ev11.style.background="#333";
ev11.style.display="block";
}
For more clarity over the question posted check the url
http://bhaswara2k13.com/events.php