function sozoku_people() {
            var haigu = document.fm.haigu.value;
            var children = document.fm.children.value;
            
            if (!haigu){haigu = 0;}
            if (!children){children = 0;}
            var sozoku =  parseInt(haigu) +  parseInt(children);
            var ans_sozoku = Math.floor(sozoku);
            if(ans_sozoku){
                document.fm.ans_sozoku.value = ans_sozoku;
            }
        }

        
        function sozoku_saimu() {
            
            var saimu = document.fm.saimu.value;
            var sosiki = document.fm.sosiki.value;

            if (!saimu){saimu = 0;}
            if (!sosiki){sosiki = 0;}

            var saimu_kei =  parseInt(saimu) + parseInt(sosiki);
            
            var ans_saimu = Math.floor(saimu_kei);
            if(ans_saimu){
                document.fm.ans_saimu.value = ans_saimu;
            }
        }
        
        
        function sozoku_zaisan() {
            var toti = document.fm.toti.value;
            var tatemono = document.fm.tatemono.value;
            var yuka = document.fm.yuka.value;
            var yotyokin = document.fm.yotyokin.value;
            var sonota = document.fm.sonota.value;
            
            var ans_zaisan = "Error";
            
            if (!toti){toti = 0;}
            if (!tatemono){tatemono = 0;}
            if (!yuka){yuka = 0;}
            if (!yotyokin){yotyokin = 0;}
            if (!sonota){sonota = 0;}

            var zaisan =  parseInt(toti) + parseInt(tatemono) + parseInt(yuka) + parseInt(yotyokin) + parseInt(sonota);
        
            var ans_zaisan = Math.floor(zaisan);
            if(ans_zaisan){
                document.fm.ans_zaisan.value = ans_zaisan;
            }
        }