date picker in new popup

sumana.gargi

When image is clicked new popup of date picker will come which is nothing but window.open and there is no domain name associated with that is the url in the window is null

When i giving selectwindow and _click(_link(10)) i am getting the below error:

Window/Domain not found: popupNameFromStep=Calendar - Management Suite; derivedName=; windowName=; windowTitle=Test/Survey/
Certification Plan; wasOpened=0; domain=

This is the script :

_click(_image("calendar18"));
_wait(50);
_selectWindow("Calendar - Management Suite");
_click(_link("10"));
_selectWindow();