Is there a way in the javascript function to determine if the value actually changed at all?  This solution changes the background color of any cell that's been put to edit mode, regardless of whether the value actually changed.

Basically, is there a "dirty" flag in cell editing client-side events?  I'm having a real hard time finding API information for the client-side events.

You can also use the

_Editing_CellValueChanged

event.  This only fires when the value changes.

FYI, for those curious, I ended up handling it myself by attaching OnEnter and OnExit client side events.  OnEnter, I attach the "original" value via a jquery data entry on the cell's DOM element and OnExit, I read it and compare to it to the current value.  If it's different, I add an appropriate CSS class.

A quick code snippet:

    function onCellEnteringEditMode(sender, e) {

        var cell, element;

        if (!e) return;

        cell = e.getCell();

        if (!cell) return;

        element = cell.get_element();

        // capture the cell's origtinal value as original value data

        $(element).data("originalValue", cell.get_value());

    }

    function onCellExitedEditMode(sender, e) {

        var cell, element, origValue;

        // make sure all inputs are proper and available

        if (!e) return;        

        cell = e.getCell();

        if (!cell) return;

        element = cell.get_element();

        if (!element) return;

        origValue = $(element).data("originalValue");

        // if original value differs from the cell's current value, highlight it!

        if (origValue !== cell.get_value()) {

            $(element).addClass("grid-cell-edited");

        }

        // clean up original value data

        $(element).removeData("originalValue");

    }