The purpose of this plugin is to be a drop-in replacement for your <select> with multiple attribute.
Note: because of the new prop() method, if you use jquery 1.6+ use jquery.multi-select.1.6.js, if not use jquery.multi-select.js.
Add a css class to all multiple select you want to customize.
<select multiple='multiple' class='your_class' name='your_name[]'>
<option value='fr'>France</option>
...
</select>
Add following code to your project
$(function(){
$('.your_class').multiSelect();
});