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Ecosystems Research Division

EPA On-line Tools for Site Assessment Calculation

   

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General Calculator Concept

The calculators were designed from the following concept

  • Client-side (i.e., running on the User's Machine) applications
  • Minimal down loading time
The calculators were implemented in JavaScript which is constrained by
  • Very limited access to the User's hard disk for storage, and
  • Limited graphics capability
Limited storage of data is performed by using JavaScript "cookies" to store inputs temporarily, and to transfer information from one calculator to another.

Common Functions


Button reference
Button Function
Example button Pastes an example data set into the calculator and calculates the result.
Calculate button Forces the calculation of the result. The calculator also returns the result when data is entered and the mouse is clicked outside the data entry box.
Clear button Erases the data from the calculator
Save button Saves the current data to the user's cookie file. All use of Cookies eliminated 2-9-2001 removed tag -->
Recall button Recalls data from the user's cookie file. All use of Cookies eliminated 2-9-2001 removed tag -->
Date button Pastes the current date into the calculator.
Goback button Returns to the page visited prior to the calculator.

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