Auto Population of a field

Question

Hi,
I need a text field to be auto populated as the sum of 2 fields when the user enters them.How can this be done?
Regards,
Vignesh

Answer 1

Hi Vignesh,
Given your two items to sum are P1_FIELD_1 and P1_FIELD_2, and the item to hold the sum is P1_SUM.
Place the following in the HTML Header of the page (if your running ApEx 4, it goes in the Function and Global Variable Declaration and don't include the script and HTML comment tags):
<script type="text/javascript">
<!--
function getSum(val1, val2) {
   if (val1 === '' || isNaN(val1))
      val1 = '0';
   if (val2 === '' || isNaN(val2))
      val2 = '0';
   return parseFloat(val1) + parseFloat(val2);
//-->
</script>Place the following in the HTML Form Element Attributes for both P1_FIELD_1 and P1_FIELD_2:
onchange="$s('P1_SUM', getSum($v('P1_FIELD_1'), $v('P1_FIELD_2')));"$s is an ApEx built-in JS function for setting the value of an item. $v is an ApEx built-in JS function for getting the value of an item.
Hope this helps,
John
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