$("#kakekinRitsuBumbo").find("option[selected ='selected']").attr("selected",false);
$("#kakekinRitsuBumbo").find("option[value='"+kke_bnb+"']").attr("selected",true);
$("#kakekinRitsuBumbo").find("option[selected ='selected']").attr("selected",false);
$("#kakekinRitsuBumbo").find("option[value='"+kke_bnb+"']").attr("selected",true);