<%
a=+(Request.QueryString('a')+'')
b=+(Request.QueryString('b')+'')
if (isNaN(a) || isNaN(b)) {a='';b='';total='' }
else {
total=a+b
}
if ((Request.ServerVariables('HTTP_ACCEPT')+'').indexOf('message/x-formresult')!=-1) {
Response.Write(total)
} else {
%>
Explanation of example
<%
}
%>