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<html>
<head>
<script type="text/javascript">
function alertbox()
{
var test=prompt("Input your name please","")
if (test!=null && test!="")
{
alert("Thanks")
}
else if (test==null)
{
test2=confirm("You are about to cancel this, press ok to continue, or press cancel to go back and input your name!")
if (test2==false)
{
alertbox()
}
}
else if (test=="")
{
alert("Please put a name in the text field!")
alertbox()
}
}
</script>
</head>
<input type="button" onclick="alertbox()" value="Press Me!" />
</body>
</html>