http://jquery.com/demo/thickbox/
kolla deras demo så får du nog det du vill ha ;)
(snabb läsning) skapar en html fil med din <select> och länkar den bara.
eller:
http://jquery.com/demo/thickbox/#sectiond-1 skrev:
* Create a link element (<a href>)
* Give the link a class attribute with a value of thickbox (class="thickbox")
* In the href attribute of the link add the following anchor: #TB_inline
* In the href attribute after the #TB_inline add the following query string on to the anchor:?height=300&width=300&inlineId=myOnPageContent \* Change the values of height, width, and inlineId in the query accordingly (inlineID is the ID value of the element that contains the content you would like to show in a ThickBox. \* Optionally you may add modal=true to the query string (e.g. #TB_inline?height=155&width=300&inlineId=hiddenModalContent&modal=true) so that closing a ThickBox will require calling the tb_remove() function from within the ThickBox. See the hidden modal content example, where you must click yes or no to close the ThickBox.

