web » clickOffset(locator,x,y)
Description
This command clicks on a specific spot of a Web element as specified via locator. If the locator does not resolve to 
a valid web element, this command will consider it as a FAIL. If the specified locator resolves to multiple web 
elements, only the first one will be considered.
Use the x and y parameter to specify where the mouse click should occur. The top-left corner of the target element
would be considered as 0,0. It is possible to specify the x and y value outside of the current dimension of the
target element. As such, the mouse click would occur outside the target element. One may consider using this command
as a way to move focus from target element (e.g. assign x to -20 and y to 0 would create a mouse-click event 
outside the bounds of the target element).
Parameters
- locator - locator of the target element
- x - the x-position relative to the top-left (0,0) corner of the target element
- y - the y-position relative to the top-left (0,0) corner of the target element