Convert select list to JSON using jQuery

How can I get the .val()'s and .html()'s of all the options from a multiple select list into a json object? Preferably using jQuery.

Thanks in advance!

A little more info:

I am using two multiple select boxes. Selecting items on the left box and moving them to the right. Once they have all the items they want selected they will push submit and it will take all the items in the right select box and move them to a main list.

Here is the code I am using once I get the JSON object:

datalistObject = JSON.parse(response);
if (datalistObject.length){
    $(".data-list tbody").empty();
    for (var i=0; i < datalistObject.length; i++) {
        var newrow = "<tr><td><input type='checkbox' name='user_id' value='" + datalistObject[i][0] + "' class='data-list-check'></td><td>" + datalistObject[i][1] + "</td></tr>";
        $(newrow).appendTo($(".data-list tbody"));
    }
}

Example html and output would be:

<select name="selecteditems">
    <option value="op1">Option 1</option>
    <option value="op2">Option 2</option>
    <option value="op3">Option 3</option>
</select>

[
    ["op1","Option 1"],
    ["op2","Option 2"],
    ["op3","Option 3"]
]