$(document).ready(function(){

	$("#reason").change(function(){
		
		var s = $(this)[0];
		var v = s.options[s.selectedIndex].value;
		
		$( 'p.message-details' ).hide();
		
		var sel = ('p#' + v)
		if ( $( sel ).length ) {
			$( sel ).show();
		}

	});
	
});