Sique sin funcionar
Código PHP:
<?php
$bd=mysql_connect ("localhost","root"," ") or die ("No puedo conectarme");
mysql_select_db("b18_4386695_emails");
$opt=$_POST["opt"];
if ($opt==1)
{
$Correo=$_POST["Correo"];
$sql="insert into correo (Emails) values ('$Correo')";
$res=mysql_query($sql,$bd) or die (mysql_error ());
}
?>
<html>
<head>
<title>Documento sin título</title>
</head>
<script language="javascript">
function verifica ()
{
if (form1.Correo.value=="")
{
alert ("Ingrese su email");
return;
}
form1.opt.value=1;
form1.submit();
}
</script>
<body>
<form id="form1" name="form1" method="post" action="">
<input type="hidden" name="opt"
<p>Correo Electronico:
<label for="Correo"></label>
<input type="text" name="Correo" id="Correo" />
</p>
<p>
<label for="Enviar"></label>
<input type="submit" name="Enviar" id="Enviar" value="Enviar" onclick=verifica()>
</p>
</form>
</body>
</html>