<html>
<head>
<script language="javascript">
function appendText() {
paraNode = document.getElementsByTagName("p") [0] ;
textNode = paraNode.firstChild ;
textNode.nodeValue += " Ouch!" ;
}
</script>
</head>
<body>
<p>Hello.</p>
<form>
<input type="button" value="Push Me" onclick="appendText()"/>
</form>
</body>
</html>