var select_category = null;
var select_subcategory = null;
	
function enable ( elem )
{
	elem.removeAttr ( "disabled" );
}

function disable ( elem )
{
	elem.attr ( "disabled", "disabled" );
}


function category_changed ( page_load )
{
	disable ( select_subcategory )
	if ( select_category.val() != '' )
	{
		var category_class = '.subcategory_item.c_id_' + select_category.val ();
		$(".subcategory_item").appendTo ( $("#subcategory_holder") );
		$(category_class, $("#subcategory_holder") ).appendTo ( select_subcategory );
		if ( page_load == false ) 
		{
			select_subcategory.val( '' );
			disable ( select_subcategory )
		}
		enable ( select_subcategory );
	}
}

$(document).ready(function() { 
	$('table.stripeMe tr:odd').find('td').addClass('odd'); 
	$('table.stripeMe2 tr:even').find('td').addClass('odd');

	enable ( select_category = $("select#select_category") );			
	disable ( select_subcategory = $("select#select_subcategory") );			
		
	select_category.change ( function () { category_changed ( false ); } );
	
	$('#select_section').change ( function ()
		{
			if ( $('#select_section') == "" ) return;
			var url = "/documents/service/" + $('#select_section').val() + "/";
			window.location.replace ( url );
		}
	);
	
	if ( select_category.val () != "" )
	{
		category_changed ( true );
	}
	
});