You can try this code:
<form action="#" method="get" id="login" style=" display:inline!important;">
<label for='User'>User:</label>
<input type='text' name='User' id='User'>
<label for='password'>Password:</label><input type='password' name='password' id='password'>
<input type="submit" name="log" id="log" class="botton" value="Login" />
</form>
The important thing to note is the css style property in the <form> tag.
display:inline!important;