Question

How would I make a drop down menu post automatically when an option has been chosen?

<SELECT NAME="select_page"><?php echo $options1;?></SELECT>

What is the best way to achieve this?

Answer 1

You can utilize the onchange event for the select element, and code a form submit:

<form method="post">
    <select name="myselect" onchange="this.form.submit();">
        <option>blue</option>
        <option>red</option>
    </select>
</form>

That will automatically submit the form when the value is changed.