Freelancer

Description

We are interested in hiring a programmer to add additional functionality to existing Javascript code from the following open source project: http://www.dhtmlgoodies.com/scripts/drag-drop-custom/demo-drag-drop-2.html.
Two columns (A, B; column A is left, column B is right - see attached drag.jpg screenshot).
Column A has 8 boxes (arbitrary number - we should be able to modify it later)
with 2 values displayed on them (lets call them W, V).
Every time a box is dragged from A to B the box id, elapsed time for the movement and box values (W,V) should be written to the database.
Additionally a display beneath column B should show the sum of W,V (separately) for the boxes moved into it (like a shopping cart - see attached drag_sum.jpg).
There should be a threshold (which we can change) for sum of values W and V. If one of these thresholds is exceeded additionally dropped boxes should be automatically moved back into there original position in A.
The W,V values should be read from a database table while initialization of the page.

I just checked the page and realized that the script is not available at the moment. I can provide a copy upon request.

We would like to see a working demo before payment (which will be done through an escrow account).