!! Calcolo somma colonne Table

table { width: 100%; margin-top: 50px; color:#0C6; background-color:#6FF; }

th, td { border: 1px solid black; padding: 8px; }

</style> 
</head> 
<body> 
<header> Barra Gialla Fissa </header> 
<table> <tr> <th>A</th> <th>B</th> <th>C</th> <th>D</th> <th>E</th> <th>Totale</th> </tr>
 <script> 
 var Mytot = 0;
 var totalA = 0; 
 var totalB = 0; 
 var totalC = 0; 
 var totalD = 0; 
 var totalE = 0; 
 
 for (var i = 1; i <= 100; i++)
  { totalA += i; totalB += i; totalC += i; totalD += i; totalE += i; Mytot = i * 5;
 document.write("<tr>"); 
 document.write("<td>" + i + "</td>");
  document.write("<td>" + i + "</td>"); 
  document.write("<td>" + i + "</td>"); 
  document.write("<td>" + i + "</td>"); 
  document.write("<td>" + i + "</td>"); 
  /*document.write("<td>" + (totalA + totalB + totalC + totalD + totalE) + "</td>"); */
  document.write("<td>" +Mytot + "</td>"); 
  document.write("</tr>"); } 
  </script> 
  </table> 
  </body> 
  </html>

<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Barra Gialla Fissa</title> <style> body { margin: 0; font-family: Arial, sans-serif; }
header { background-color: yellow;
color: black;
padding: 10px 0;
text-align: center;
position: fixed; width: 100%;
top: 0; z-index: 1000;
}

table { width: 100%; margin-top: 50px; color:#0C6; background-color:#6FF; }

th, td { border: 1px solid black; padding: 8px; }

</style>
</head>
<body>
<header> Barra Gialla Fissa </header>
<table> <tr> <th>A</th> <th>B</th> <th>C</th> <th>D</th> <th>E</th> <th>Totale</th> </tr>
<script>
var Mytot = 0;
var totalA = 0;
var totalB = 0;
var totalC = 0;
var totalD = 0;
var totalE = 0;

for (var i = 1; i <= 100; i++)
{ totalA += i; totalB += i; totalC += i; totalD += i; totalE += i; Mytot = i * 5;
document.write("<tr>");
document.write("<td>" + i + "</td>");
document.write("<td>" + i + "</td>");
document.write("<td>" + i + "</td>");
document.write("<td>" + i + "</td>");
document.write("<td>" + i + "</td>");
/*document.write("<td>" + (totalA + totalB + totalC + totalD + totalE) + "</td>"); */
document.write("<td>" +Mytot + "</td>");
document.write("</tr>"); }
</script>
</table>
</body>
</html>