Show hide text

HTML

<p>some text... dfsdfdsfsdfds
ssdfsdfdsfdsfsdsfdsfs

sdfsdfdsfdsfsdfsd

sdfdsfdsfdsfsdfdsf<span class="ReadMore">Read More</span></p>
<p class="ReadMoreBox">some more text dfsdfdsfdssdsdf sdfsdfdsf
sdfdsfdsfdsfds
sdfdsfdsfdsfdsfds
sdfsdfds</p>

JavaScript

$(".ReadMoreBox").hide();
$(".ReadMore").on("click", function(){
    $(".ReadMoreBox").slideToggle('fast');
});