Sum inputs that id starts with

[kyriacoullis]

hi there,

I have several forms that have a total field with the id gtotal1 gtotal2 gtotal3 ..... up to 35

I would like a Grand Total of those fields. I would like to SUM those fields.

I am looking for a code like:

If input id contains gtotal then sum that inputs value.. something like that.

I hope i was clear

[RamananKalirajan]

Hi Kyriacoullis,
You can easily do that,

var totSum=0;
for(var i=0;i<100;i++)
{
  var tempId="gtotal"+i;
  try
  {
  if(document.getElementById(tempId).value!="")
      totSum+=document.getElementById(tempId).value;
  }
  catch(e)
  {
    alert(e.message);
  }
}
alert("Total Sum = "+totSum);

Thanks and Regards
Ramanan Kalirajan

[Dormilich]

the best would be to give each of those fields a common class name, so that you can access the elements with document.getElementsByClassName()

EDIT: @Ramanan I think it’s not worth testing each ID, they are just not made for this purpose.

[RamananKalirajan]

@ Dormilich,
Ya I am agreeing your point but document.getElementsByClassName() is not supported in IE. It will work fine in Mozilla. But it wont be working in IE, we have write a user defined function for that. But coding with ID will be working in all the browsers.

Thanks and Regards
Ramanan Kalirajan

[acoder]

How about taking any good version of getElementsByClassName and including it for any browsers that don't support it (by testing for its support):

if (!document.getElementsByClassName)

[Dormilich]

for instance Robert Nyman’s getElementsByClassName()