Selective HTML form text field adder
where 1 is a common number across all fields to be added, and where total1 is a field to save the total to. Work in progress to solve this common problem.
totalTheTotals(a,b,c) adds the value of a and b and puts it in c.
<script language="javascript" type="text/javascript"> function selectiveTotal(form, which) { var total = 0; for(var j = 0; j < form.elements.length; j++){ var cid = form.elements[j].id.toString(); if ((form.elements[j].type == "text") && (form.elements[j].value.length > 0) && (cid.charAt(cid.length-1) == which) && (cid != "total" + which)) { total += parseInt(form.elements[j].value); } } document.getElementById("total" + which).value = total; totalTheTotals("1","2","3"); } function totalTheTotals(a, b, c) { var total = parseInt(document.getElementById("total" + a).value) + parseInt(document.getElementById("total" + b).value); document.getElementById("total" + c).value = total; } </script>