<style>
.plus{ position: absolute;top:0px;right: 0px; width: 31px;height:31px; background-color: #eaeaea; cursor:pointer; z-index: 1; }
.plus:before{ position:absolute; top: 50%; left: 50%; width: 16px; height: 2px; margin: -1px 0 0 -8px; background: #fff; content: ''; }
.plus:after{position: absolute; top: 50%; left: 50%; width: 2px; height: 16px; margin: -8px 0 0 -1px; background: #fff; content: ''; }
</style>
<div class="plus"></div>