Multiple select form: is it possible passing javascript variable to PHP?

Hi, I have an html multiple select form and I would like to pass the selected values into PHP variable and insert the values into MySQL. But when I submit the values, I got something like: name.php3?select_name=1&select_name=2&select_name=4 where select_name is the name of <select> and the 1, 2 and 4 is the <option> values selected. I know I can refer to the selected values using javascript window.document.form_name.select_name.options[window.document.form_name.sele ct_name.selectedIndex].value but I don't know how to pass the value into PHP variable. Can these javascript variables be passed into PHP or Is there way to work around it? I know the problem can be solved if I use check boxes or radio buttons but I must use <select multiple> in my website (the multiple select form is generated by javascript menu swapper). Thanks for any help! Eager =:o3