Automatic redirects should not be used, or should be configurable by the user, see Checkpoint 2.3.
You should ensure that all content is accessible when script is disabled/not supported see, see Checkpoint 4.4.
onMouseOver is device specific, and keyboard users, may not be able to access this functionality, setting onFocus equal to onMouseOver is one solution to this.
onMouseOver is device specific, whilst onmouseover=onfocus and there is a tabindex, tabbing to this element by the keyboard is only supported in Internet Explorer, and is not part of any recommendation.
onMouseOver is device specific, if the user has no mouse, there is no way to access this content.
onMouseOver is device specific use device-independant event handlers, Checkpoint 2.5
Opening fullscreen windows is not a good idea, (this is just an example of the sort of analysis that is possible)
Opening windows automatically, is not a good idea, see Checkpoint 2.3