Open Calendar at mouse position?

How can I make the Calendar show up relative to the mouse position? Do I have to control this by manipulating my container div element or are there any built-in functionalities to control this through the Calendar object like:

myCal.setPosition(x,y); ?

Thank you

Yes, there is setPosition method. However, it takes the top as the first parameter:

myCal.setPosition(top,left);