<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
<script>
function valid()
{
var hasilnama= document.getElementById("nama").value
var polanama=/^\([(021)(081)]\)\-[0-9]*$/;
if(!polanama.test(hasilnama))
{
alert("salah");
}
else
{
alert("sukses");
}
}
</script>
</head>
<body>
<form id="form1" name="form1" method="post" action="" onsubmit="valid();">
<input type="text" name="nama" id="nama" />
<input type="submit" name="button" id="button" value="Submit" />
</form>
</body>
</html>
