DOM Events
        
            Test Description: dispatchEvent - DOMException NOT_SUPPORTED_ERR raises if the Event object
            has not been created using DocumentEvent.createEvent().
        
        
        
        
        
            Steps:
            
                -  Click button "Cache the MouseEvent object"
                
-  Click button "Dispatch the MouseEvent object"
            
Test passes if the word "PASS" appears below after following the above steps.
        Test result: 
        FAIL