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I'm creating a list that helps track employees projected hours they spend on projects as well as holiday, training and vacation hours. However the holiday field is part of a look up from another list. I also need the totals to show as employees fill out the form, not after they save it. So the Calculate Column does not work for this particular form. I know JavaScript can help but do not know how to have it calculate the regular columns and the lookup column. I will also then need to compare and validate against another lookup column. Can anyone help write that code?

Thanks

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The following example for your reference.

1.Create a custom list, and add lookup column "holiday", number columns "training","vacation" and "totals" into list.

2.Add the following code into script editor web part in new/edit form page.

<script src="http://code.jquery.com/jquery-1.12.4.min.js" type="text/javascript"></script>
<script type="text/javascript">
function PreSaveAction() { 
    var holiday= $("select[title='holiday'] option:selected").text();
    var training= $("input[title='training']").val();
    var vacation=$("input[title='vacation']").val();
    var totals=parseInt(holiday)+parseInt(training)+parseInt(vacation);
    alert("Totals:"+totals);
    $("input[title='totals']").val(totals);
    return true;
}
</script>

3.Click the save button we can see the "totals" value.

enter image description here

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