How to hide a in a <select> menu with CSS?

Answer 1

You have to implement two methods for hiding. display: none works for FF, but not Chrome or IE. So the second method is wrapping the in a with display: none. FF won't do it (technically invalid HTML, per the spec) but Chrome and IE will and it will hide the option.

EDIT: Oh yeah, I already implemented this in jQuery:

jQuery.fn.toggleOption = function( show ) {
    jQuery( this ).toggle( show );
    if( show ) {
        if( jQuery( this ).parent( 'span.toggleOption' ).length )
            jQuery( this ).unwrap( );
    } else {
        if( jQuery( this ).parent( 'span.toggleOption' ).length == 0 )
            jQuery( this ).wrap( '' );
    }
};

EDIT 2: Here's how you would use this function:

jQuery(selector).toggleOption(true); // show option
jQuery(selector).toggleOption(false); // hide option

EDIT 3: Added extra check suggested by @user1521986