Q:

nested jquery selectors without class/id

i'm working on an already made website from other developer. In his site, he has a div with 3 a href tags but do not have id/class:
        <div id="Menu_1">

            <a href="" target="_blank">
                <img src="img/common/btn_1.png" alt="">
            </a>
            <a href="#" target="_blank>
                <img src="img/common/btn_2" alt="">
            </a>
            <a href="#" target="_blank>
                <img src="img/common/btn_3.png" alt="">
            </a>
       </div>

I must use jquery for his website without changing anything from his own html/css. 
I try 
$("#Menu_1 a img:first-child").click(), 
$("#Menu_1 a img:last-child").click() 
// don't know how to select the middle button

but none of them are working. Is there anything wrong with my nexted jquery selectors?

A:

You can use .eq(#) to select any element that selector returns (0 based)

$(document).ready(function() {
  $('.wrapper a').eq(0).css('color', 'red');
  $('.wrapper a').eq(1).css('color', 'blue');
  $('.wrapper a').eq(2).css('color', 'green');
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="wrapper">
  <a href='#'>First</a>
  <a href='#'>Second</a>
  <a href='#'>Third</a>
</div>

