I think the her best bet is to just type in the Javascript in the HTML editor.
Here's a quick example that will get the job done.
Put this in the <head> section:<head>
<SCRIPT language="Javascript" type="text/javascript">
<!--
function alertBox()
{
alert("Type your alert text here.");
return false;
}
// -->
</SCRIPT>
</head>
Put this in the <body> section:<body>
<div style="cursor:hand;" onClick="return alertBox()">Click here.</div>
</body>
