[HTML] pobierz, plaintext 
 
<script type="text/javascript">
 
var f = document.forms["logowanie"];
				if(f.login.value == ""){
					document.getElementById("submit").disabled = true;
				}
				else{
					document.getElementById("submit").disabled = false;
				}
				if(f.haslo.value == ""){
					document.getElementById("submit").disabled = true;
				}
				if(f.haslo.value != ""){{
					document.getElementById("submit").disabled = false;
				}
 
 
</script>
 
<form action="" method="post" id="logowanie">
			<table width="100%">
				<tr>
					<th>Logowanie</th>
				</tr>
				<tr>
					<td>Login</td>
				</tr>
				<tr>
					<td><input name="login" type="text"/></td>
				</tr>
				<tr>
					<td>Hasło</td>
				</tr>
				<tr>
					<td><input name="haslo" type="password" /></td>
				</tr>
				<tr>
					<td><input type="submit" value="Zaloguj" id="submit"/></td>
				</tr>
			</table>
			</form>
 
 
[HTML] pobierz, plaintext