(function($){$.fn.chained=function(parent_selector,options){return this.each(function(){var self=this;var backup=$(self).clone();$(parent_selector).each(function(){$(this).bind("change",function(){$(self).html(backup.html());var selected="";$(parent_selector).each(function(){selected+="\\"+$(":selected",this).val();});selected=selected.substr(1);var first=$(parent_selector).first();var selected_first=$(":selected",first).val();$("option",self).each(function(){if(!$(this).hasClass(selected)&&!$(this).hasClass(selected_first)&&$(this).val()!==""){$(this).remove();}});if(1==$("option",self).size()&&$(self).val()===""){$(self).attr("disabled","disabled");}else{$(self).removeAttr("disabled");}
$(self).trigger("change");});if(!$("option:selected",this).length){$("option",this).first().attr("selected","selected");}
$(this).trigger("change");});});};$.fn.chainedTo=$.fn.chained;})(jQuery);