Question

I have a form with multiple textboxes and number of textboxes do change depending on the values I retrieve from the database. What I am trying to do is multiply all values of textfields values so first I put them into an array and multiply them and send the answer to a textbox. But I cant seem to get the right answer.

For example when I have 3 textboxes and I enter 1 to each text box I should get 1x1x1 = 1 but I get answer as 3. An when I enter 2 in each text box I should get 2x2x2 = 8 but answer is 12.

My code is as follows:

Javascript Code:

function sumfrm(form){ 
  var totalOdds = 0;
  var odds = document.getElementsByTagName('input');
  var n;
  var i; //
for (i = 0; i < odds.length; ++i) {
  n = parseFloat(odds.item(i).value, 10);
    if (!isNaN(n)) {
       totalOdds += n*n;
   }
}

Answer 1

var totalOdds = 1; //initialize like this
totalOdds = totalOdds * n // do this in your for loop

should do the trick

What you currently have for 1x1x1.

totalOdds in the begining is 0

After
totalOdds += 1 * 1

is 1

Again after second time
totalOdds += 1 * 1

is 2

and after third time it is 3