Calender hide onBlur problem

I know that the calendar extender is suppose to hide when you click outside of the control, but it's not for me. I'm using the calendar control in association with a button. Both the button and the control are being added dynamically to the page. The follow is the code used to build these controls.

oNewImage =New Image

oNewImage.EnableViewState =True

oNewImage.TabIndex = 0

oNewImage.CssClass ="CalendarPopup"

oNewImage.ID ="CalendarPopup" &CInt(glintCountCalendarImage)

oNewImage.ImageUrl ="..\images\CALENDAR.ICO"

oNewImage.Visible =True

oNewAjaxCalendar =New AjaxControlToolkit.CalendarExtender

oNewAjaxCalendar.TargetControlID = oNewTextBox.ID.ToString

oNewAjaxCalendar.OnClientShowing ="showingCalendar"

oNewAjaxCalendar.PopupButtonID = oNewImage.ID.ToString

oNewAjaxCalendar.Format ="MMddyy"

oNewAjaxCalendar.CssClass ="icmsCalendar"

oNewAjaxCalendar.PopupPosition = AjaxControlToolkit.CalendarPosition.BottomRight

oNewAjaxCalendar.ID ="AJAXCALENDAR" &CInt(glintCountCalendarImage)

oNewAjaxCalendar.OnClientDateSelectionChanged ="hideCalendar"

oNewTextBox.Attributes.Add("JUSTIFY","RJ")

oWebForm.Controls.Add(oNewImage)

oWebForm.Controls.Add(oNewAjaxCalendar)

Hi James,

Use an ImageButton instead of an Image!

Let me know how that works out ;)
Kind regards,
Wim