obj.total1.value = parseInt(obj.radiobutton[0].value)*obj.text1.value;
obj.total2.value = parseInt(obj.radiobutton[1].value)*obj.text1.value;
.....同名的radio是数组
obj.total2.value = parseInt(obj.radiobutton[1].value)*obj.text1.value;
.....同名的radio是数组
if(obj.radiobutton[i].checked)
alert(obj.radiobutton[i].value);