Basic DOM tutorial: Using DOM + Css

1. Use getElementsByTagName to modify the class category or append the category

The code copy is as follows:

<ul onclick="clickz()">

<p>First</p>

<p>First</p>

<p>First</p>

<p>First</p>

</ul>

<script type="text/javascript">

function clickz(){

var ulo = document.getElementsByTagName("ul")[0];

ulo.className = "name2";//Modify<br> //ulo.className += "name2"; //For append categories

} </script>