Advertisement
Not a member of Pastebin yet?
Sign Up,
it unlocks many cool features!
- <html>
- <head>
- <title>Площадь</title>
- <script>
- function square() {
- var R = document.getElementById("num1").value;
- var r = document.getElementById("num2").value;
- document.getElementById("res").value = Math.PI * (R*R - r*r);
- }
- </script>
- </head>
- <body>
- <p>
- Вычисление площади кольца
- </p>
- <form name="form1">
- Внешний радиус R: <input id="num1" type="text" size="8" name="num1">
- </form>
- <br>
- <form name="form2">
- Внутренний радиус r: <input id="num2" type="text" size="8" name="num2">
- </form>
- <hr>
- <form name="form3">
- Площадь: <input type="text" id="res" size="8" name="res">
- </form>
- <input type="button" value="Обновить" onclick="square();">
- </body>
- </html>
Advertisement
Add Comment
Please, Sign In to add comment
Advertisement