bug in getting timestamp in editorgrid

[cag3]

[ext 1.1]


grid.on('afteredit', updateDB);
function updateDB(grid){
console.log(grid);
if (grid.value instanceof Date){
alert(grid.value.getDate());
var fieldValue = grid.value.getDate()
} else {
var fieldValue = grid.value;
} The alert timestamp has 3 extra zero's in the stamp.
Is this is a bug?