How to retrieve the position of the selected cell on The Calendar in Javascript ? I want to bring up a TextBox on top of the clicked cell à the position of the selected cell. Acually I've this code but the position of the mouse click is not on the top of the cell. DayPilotCalendar.TimeRangeSelectedJavaScript = "ClicCaseVide(event, start, end, column);"; DayPilotCalendar.TimeRangeSelectedHandling = DayPilot.Web.Ui.Enums.TimeRangeSelectedHandling.JavaScript; function ClicCaseVide(e, start, end, column) { var div = document.getElementById('TxtBoxCreateRDV'); PosX =(ev.clientX + document.documentElement.scrollLeft); PosY = (ev.clientY + document.documentElement.scrollTop); div.style.left = PosX + 'px'; div.style.top = PosY + 'px'; div.style.visibility = "visible"; } Thank you. Laurent.