style hover background-color red style script type text javascript cha

<style>
.hover {
background-color:red;
}

</style>

<script type="text/javascript" charset="utf-8">

$(document).ready(function(){  

$('p').mouseover(function(){
     $(this).addClass('hover');
   }).mouseout(function(){
     $(this).removeClass('hover');
   });

});