grid filtering for null

Hi
Is there a way to filter a grid for null in a date column? I’ve tried both the client-side “filterby” and server-side myGrid.load("data/grid.php?connector=true&dhx_filter[6]=null

I was trying to avoid creating another php query file.

Thanks

Theo

You may try to use the function parameter of the filterBy method:
myGrid.filterBy(0,function(a){ return (a==="");})