Mega Code Archive
Use do-while loop and prompt dialog to read user input
<![CDATA[
< html>
<head>
<title>A Simple Page</title>
<script language="JavaScript">
<!--
do
{
sometext = prompt("Enter some text","");
}
while (sometext == "");
alert(sometext);
// -->
</script>
</head>
<body>
</body>
</html>
]]>