function toBin(form,i) {
        base = checkvalue(form.base[i].value);
        num = checkvalue(form.num[i].value);
        sum = eval(base)+eval(num);
        alert(comma(sum));
        form.amount[i].value=comma(sum);
    }

<% for i = 0 to 1 %>

<input type=text name=num size=8  value="100,000"> +   
<input type=text name=base size=8 value="200,000"> =
<input type=button value="합계" onclick="toBin(this.form,<%=i%>)">
<input type=text name=amount size=15>

<% next %>