Need to disable the selected drop down items

Need to disable the selected drop down items

Needed to disable few items from a HTML drop down box, with a 'Submit' button not just normal click or normal button.

Reason of doing this:
I  have, a jsp page where I need to perform operations that needs a page to re-load from servlet. Thus have submit button, so once a user is on the page, the drop down having item disabled should remain disabled for the entire session.

Any one who could help me doing that using Jquery or Javascript would be great.

I know to do the normal disable in JQuery can be done via this->      

$("#mySelect option['value=test']").attr("disabled","disabled");