01.
<meta charset=
"utf8"
>
02.
<form name=
"frmMain"
action=
""
method=
"post"
>
03.
<script language=
"JavaScript"
>
04.
function
fncSum()
05.
{
06.
07.
08.
if
(isNaN(document.frmMain.txtNumberA.value) || document.frmMain.txtNumberA.value ==
""
)
09.
{
10.
alert(
'กรุณากรอกข้อมูลตัวที่ 1'
);
11.
document.frmMain.txtNumberA.focus();
12.
return
;
13.
}
14.
15.
16.
if
(isNaN(document.frmMain.txtNumberE.value) || document.frmMain.txtNumberA.value ==
""
)
17.
{
18.
alert(
'กรุณากรอกข้อมูลตัวที่ 2'
);
19.
document.frmMain.txtNumberA.focus();
20.
return
;
21.
}
22.
23.
var
a = parseFloat(document.frmMain.txtNumberE.value);
24.
25.
var
b = parseFloat(document.frmMain.txtNumberA.value);
26.
27.
s = (a / b ) * 100;
28.
29.
document.frmMain.txtNumberI.value= s.toFixed(2);
30.
document.frmMain.txtNumberH.value= s.toFixed(2);
31.
32.
}
33.
</script>
34.
หาผลรวม <br>
35.
<input type=
"text"
name=
"txtNumberA"
value=
""
OnChange=
"fncSum();"
>
36.
<input type=
"text"
name=
"txtNumberE"
value=
""
OnChange=
"fncSum();"
>
37.
ผลรวมเท่ากับกี่เปอร์เซ็น = <input type=
"text"
name=
"txtNumberI"
value=
""
disabled><br>
38.
<input type=
"hidden"
name=
"txtNumberH"
value=
""
>
39.
</form>