How to remove element using javascript

We use removeChild() to remove element

<div id="div1">
        <p id="p1">TechFunda.</p>
        <p id="p2">DotNetFunda</p>
    </div>
    <script>
        var a = document.getElementById("div1");
        var b = document.getElementById("p1");
        a.removeChild(b);
    </script>

It removes the id value which we have given "p1".