Validating The Sum Of Two Inputs

Aug 31, 2009

I am trying to write a js that validates a form with two text inputs. The two inputs are: 'D_techA' and 'D_techB'. I just want to add up (sum) the two input fields (which must be positive numbers) and make sure that they add up to exactly 100 (not more and not less). If they do not add up to 100, then an alert should pop up that says "The two values must add up to exactly 100." I have tried and tried to write a js that does this validation (looking at numerous validation scripts posted in this forum and elsewhere) and I just cannot seem to make it work.

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Untitled Document</title>
</head>
<body>
[Code]...

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Code HTML4Strict:

<form name="autoSumForm">
<p>
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101<input class="right" type=text name="firstBox[]" value="" onFocus="startCalc();" onBlur="stopCalc();">

[code]....

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<head>
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[code]....

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In other words

<input type="text" name="name_first">
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Code:

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/* <![CDATA[ */
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[code]...

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