document.onkeydown = funDown;
          
 function funDown() 
 { 
     if(window.event && window.event.keyCode == 17)  
     { // Capture and remap ctrl
       window.event.keyCode = 17; 	
       return false; 
     } 
     //if(window.event && window.event.keyCode == 82)  
     //{ // Capture and remap R
    //   window.event.keyCode = 555; 	
    //   return false; 
     //} 
            
     //if(window.event && window.event.keyCode == 78)  
    // { // Capture and remap N
     //  window.event.keyCode = 555; 	
    //   return false; 
    // } 
	// if(window.event && window.event.keyCode == 72)  
    // { // Capture and remap H
    //   window.event.keyCode = 555; 	
    //   return false; 
    // } 
	// if(window.event && window.event.keyCode == 79)  
    // { // Capture and remap O
     //  window.event.keyCode = 555; 	
     //  return false; 
    // } 
	// if(window.event && window.event.keyCode == 66)  
    // { // Capture and remap B
     //  window.event.keyCode = 555; 	
     //  return false; 
     //} 
	// if(window.event && window.event.keyCode == 69)  
     //{ // Capture and remap E
     //  window.event.keyCode = 555; 	
     //  return false; 
     //} 
	 //if(window.event && window.event.keyCode == 73)  
   //  { // Capture and remap I
     //  window.event.keyCode = 555; 	
     //  return false; 
     //} 
	 //if(window.event && window.event.keyCode == 76)  
    // { // Capture and remap L
    //   window.event.keyCode = 555; 	
     //  return false; 
    // }
	// if(window.event && window.event.keyCode == 70)  
    // { // Capture and remap F
    //   window.event.keyCode = 555; 	
    //   return false; 
    // } 
	 if(window.event && window.event.keyCode == 122)  
     { // Capture and remap F11
       window.event.keyCode = 555; 	
       return false; 
     } 
 }