<html><head><title>Login</title><script language="">function validate(form){if(form.username.value.length==0){alert("Enter username!");form.username.focus();return false;}if(form.userpassword.value.length==0){alert("Enter password");form.userpassword.focus();return false;}return true;}</script></body><body><h1>Login</h1><form method="post" action="login.php" onsubmit="return validate(this)"><p>User Name: <input type="text" name="username"></p><p>Password: <input type="password" name="userpassword"></p><p><input type="Submit" value="Login"></p></form></body></html>