test

tstst

by rmkk

HTML

<div class="first2">A</div>
<div class="second">B</div>

CSS

div {
    width: 100px;
    min-height: 100px;
    margin: 5px;
    line-height: 100px;
    text-align: center;
    font-size: 2em;
    border: 1px solid #999;
}

JavaScript

var first = $('.first2'),
    second = $('.second');
first.click(
    
    function(){
        second.css('display', 'none');
    }
);