I have 4 serailized arrays that I want to pass to php for processing. What is the best way to combine them into a single array>

example:

serial_1 = $('#col1').sortable('serialize');
serial_2 = $('#col2').sortable('serialize');
serial_3 = $('#col3').sortable('serialize');
serial_4 = $('#col4').sortable('serialize');`

each serialized array relates to a column/section of the page (col1,col2 etc.) What I need to do/would like to do is create a single array that puts the serialized array inside another array for a single post.

example:

var new_array = serilaize(col_1(serial_1),col2(serial_2),col3,(serial_3),col4(serial_4))

I KNOW THAT IS NOT RIGHT as I have no idea in JQuery how to right the correct syntax.

This new array is to be posted via ajax like this:

        $.ajax({
    url: "test.php",
    type: "post",
    data: new_array,
    error: function(){
    alert('SOME ERROR MESSAGE');
    }
    });

Thanks in advance