Disable The Selected Value In Drop Down Menu

I have this drop down menu.It stores month, Jan-Dec. User can choose any value of the drop down menu but just one time only. Meaning, lets say previously he choose Jan, the next ti

Solution 1:

Here are three working examples of what you're looking for:

Using jQuery:

http://jsfiddle.net/wLNZX/

With plain JavaScript:

http://jsfiddle.net/wLNZX/1/

Coded inline with the <select> tag:

http://jsfiddle.net/wLNZX/2/