Append input text field with value of a div

$(this).append('<input type="text" value=' + $('#div1').val() + '>');

don't forget to concatonate with +

Also, this assumes $(this) is an actual object.

$(this).append('<input type="text" value='+ $('#div1').html()+ '>');

Don't use HTML strings for everything!

$(this).append(
    $('<input>', {
        type: 'text',
        val: $('#div1').text()
    })
);