Use values from one javascript function into another

I need a little hand here, both this javascript functions are working properly, but I need a value from the first script, so I can "POST" it, but I can't figure out how to make the (string[3]) value to show on the second script and therefore use it.

The only function of this first script is to get values from the getsong.php file

<script type="text/javascript">
var string[3]{
$(document).ready(function(){
$("#jquery_jplayer_1").jPlayer({
    ready: function () {
        var data = $.ajax({
          url: "getsong.php",
          async: false
         }).responseText;

         string = data.split('|');
        $(this).jPlayer("setMedia", {
            mp3: string[0]
        }).jPlayer("play");

        $('ol#one').html(string[1]);
        $('ol#two').html(string[2]);
        $('ol#three').html(string[3]);

    },
    ended: function (event) {  
        var data = $.ajax({
          url: "getsong.php",
          async: false
         }).responseText;

         string = data.split('|');
        $(this).jPlayer("setMedia", {
            mp3: string[0]
        }).jPlayer("play");


        $('ol#one').html(string[1]);
        $('ol#two').html(string[2]);
        $('ol#three').html(string[3]);

    },
    swfPath: "js",
    supplied: "mp3"

});
});

Then the only function is second script to post to the "update_db.php" with a value from (string[3]) from the script above, and also is reloading the page at the same time. I need the value in the 'STRING[3] GOES HERE' area.

$(function() {
$("#submit01").click(function() {
var song_id = $("#song_id").val();
var dataString = 'song_id='+ 'STRING[3] GOES HERE';

if(song_id=='')
{
$('.success').fadeOut(200).hide();
$('.error').fadeOut(200).show();
}
else
{
$.ajax({
type: "POST",
url: "update_db.php",
data: dataString,
success: function timedRefresh(timeoutPeriod) {
setTimeout("location.reload(true);","0");
}
});
}
return false;
});
});


/////
}

</script>