$(document).ready(function(){
var value_str;
var form_obj = $(document).find('.filtering').find('select:first');;
var filtering = function(){
var class_str = $(this).attr('class');
if(value_str == 'all'){$(this).show();
}else if(class_str == value_str){$(this).show();
}else if(class_str.length != 0){$(this).hide();}}
var scanning = function(){
var area_obj = $(document).find('.filteringArea');
var tr_obj = area_obj.find('tr');
var block_obj = area_obj.find('.block').children(0);
value_str = $(this).find("option:selected").val();
tr_obj.each(filtering);block_obj.each(filtering);}
form_obj.change (scanning);});