Catch cell in doubleClick

Hi,

I'm trying to block events clientside (doubleclick, to add an event)

During the dps_BeforeCellRender, I place the cells to isBusiness (+ change CSS)

Then i catch the event using the javascript function

function timeRangeDoubleClick(start, end, resource) {
/*do lots of checks*/
}

in this function I cant find a way to check if the cell is a business cell. Any help?