If Statement

I'm assuming all of these fields are just numbers, not Date objects. If this is not correct, then the code below will not work.

PS - You should also probably handle the case when Start_Time1 is exactly 7.

First you can not use the 'Simplified Field Notation' is very limited to most simple field names and some basic operations. You can not access any field properties, methods, call functions, or use any logical control statements, 'if'.

You will have to write this as a 'Custom JavaScript calculation' in JavaScript. JavaScript is an object orientated language, so you must obtain the object you are interested in before you can access any property of the field, value, or method.

The date and time values in a field are specially formatted character strings. So you are going to need to convert these strings into a date or time object.
Looked at [url=http://www.acrobatusers.com/tutorials/2006/date_time_part1]Working with date and time in Acrobat JavaScript (Part 1 of 3)[/url] by Thom Parker to see what is involved.

See [url=https://acrobat.com/#d=7mFLg0SJD18SwNzcEj9*sw]Weekly Time Sheet[/url] for a working example. Since there are a number of repeated calculaitons, functions have been used for reuse and ease of maintaining the code, code in only one location needs to be updated for modifications.

I would by figuring out how to compute a simple time difference in time using a start and end time.

You should have access the [url=https://developer.mozilla.org/en/Core_JavaScript_1.5_Reference]Mozilla JS 1.5 Reference[/url] and the [url=http://www.adobe.com/devnet/acrobat/javascript.php]Acrobat JS API Reference[/url].

Thank you both for your help!! Try67, that code works perfectly, and I did forget to include the >= for 7. Thanks! And thanks gkaiseril for the other references and explaining the "Simplified" and "Custom". I always threw my code in each to see if it worked, but yeah, no go. You both saved me a lot of time!! Thanks again!!!

I tried looking at the Timesheet link you gave me, but the form i previewed and downloaded has no cells to fill in. No calculations or anything, just a simple print and write in form. Maybe I'm missing something... And, the page 3 of that link about date/time is also "not found". I did run into the time issue surrounding 15 minutes, 30, or 45 minutes past an hour. That screwed up the math. Unfortunately not everyone works on even hours. I'll look around more about time calculations beyond even hours. Thanks!

The updated [url=https://acrobat.com/#d=xVmbN3cQ*x2Prm9in4wrnw]Timesheet[/url].

Thanks for the update, I've read a lot about the document level javascript, but can't seem to create it, or find it in this case. Our time sheet that I was tasked to make fillable for distribution, simply has a start, lunch length (usually 1 hour), end work, and a total at the end. If I could modify the form from the link, that'd be great, but can't open the document level java to edit the fields it's pulling data from. I have Acrobat 9 Standard, and I've yet to find any forum that explains how to create the document level java.

To edit the document level scripts, you need the Professional version. But it should be possible to add function scripts to the open page action and have them initialize when the page opens. For a one page form there is little chance of the code running twice, but one could add a variable to prevent that.