# thumb wheel up => next page
"xdotool key Alt_L+Right"
   b:6                                   
                                        
# thumb wheel down => previous page       
"xdotool key Alt_L+Left"      
   b:7                                   
                                        
# backward button => volume down
"xte 'key XF86AudioLowerVolume'"              
   b:8                                   
                                        
# forward button => volume up         
"xte 'key XF86AudioRaiseVolume'"            
   b:9