To implement data movement between two drop-down boxes, add
$(' #add').click(function(){
var $options = $('#select1 option:selected'); //Get the selected item
var $remove = $options.remove();
$remove.appenTo('#select2');
});
Simplified as follows
$('#add').click(function(){
var $options = $('#select1 option:selected'); //Get the selected item
$remove.appenTo('#select2');
});