Untitled

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<script>function validaDatos() {

var usario = document.getElementById("user");
var password = document.getElementById("pass");

if ((usuario.value == "" || usuario.value == '' || usuario.value == null)
&& (password.value == "" || password.value == '' || password.value == null)) {

alert("Ingresa tu Usuario y password");

run.focus();

return false;

} else if (usuario.value == "" || usuario.value == ''
|| usuario.value == null) {

alert("Ingresa tu Usuario");

usuario.focus();

return false;

} else if (password.value == "" || password.value == ''
|| password.value == null) {

alert("Ingresa tu Pasword");

password.focus();

return false;

} else {
}
return true;
}
</script>


<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>REGISTRAR</title>
</head>
<body>

<form action = "ServletEncriptar" method = "post" onsubmit="return validaDatos();">
<center>

Ingrese Usuario:
<input type = "text" name = "user">
<br><br>
Ingrese password:
<input type = "password" name = "pass">
<br><br>
<input type="submit" style="width:80px"  value="Registrarse">
</center>
</form>
</body>
</html>