options.php multiple select with options in a submit form

here are my code

$categories = get_categories( $args );
	?>
	<div class="wrap">
	<h2>Theme Options</h2>
	<form id="categoris_post" method="post" action="options.php">
	<?php wp_nonce_field('update-options'); // Security - used to validate source. ?>
	<p><strong>first posts:</strong></p>
	<select id="posts_by_category" class="postform" name="first" value="<?php echo get_option('first');?>">
	<option value="">All</option>
	<?php foreach ( $categories as $category ) {?>
	<option class="level-0" value="<?php echo $category->name;?>"><?php echo $category->name;?></option>
	<?php }?>
	</select>

	<p><strong>second posts:</strong></p>
	<select id="recent_post" class="postform" name="second" value="<?php echo get_option('second');?>">
	<option value="">All</option>
	<?php foreach ( $categories as $category ) {?>
	<option class="level-0" value="<?php echo $category->name;?>"><?php echo $category->name;?></option>
	<?php }?>
	</select>

	<p><input type="submit" name="Submit" value="Save Options" /></p>
	<input type="hidden" name="action" value="update" />
	<input type="hidden" name="page_options" value="first" />
    <input type="hidden" name="page_options" value="second" />

	</form>
	</div>

i want to submit the two values from the selectors
please help
thank you