calulated fields in a form

[tech88]

I am trying to create calclated fields in a (Front Page) form. It should calculate square feet based on Length, Height and Width fields. Length X Height X Width = Square Feet. Then it will calculate how many gallons of paint will be required base on gallons per square foot (constant value).

Is there a way to do a calculation in the form?

I can put together a javascript calculator that gives the results I need but I do not know how to pass this resulting value to the form/field in order to submit the information to a file.

 

[DeZiner]

Take the final of your calculated variable from the script ie: sqFt=varH * varW * varD

Then create a hidden form field

<input type=&quot;hidden&quot; name=&quot;square_feet&quot;>

Then in the javascript put:

document.form.square_feet.value=sqFt

Pu that in a function called doSqFt or something, then on the submit button:

<input type=&quot;submit&quot; Value=&quot;Submit&quot; onClick=&quot;doSqFt();&quot;>

This will take the value from your script set it as the alternate variable and write the value to the hidden form field. DeZiner
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