Function to restrict Right Click and Refresh(F5)

function notAllowed()
{
 if(event.ctrlKey)
 {
  alert("This Operation Is Not Allowed");
  event.keyCode=0; 
  return false;
 }
 if ((event.altKey))
 {
  alert("This Operation Is Not Allowed");
  event.keyCode=0; 
  return false;
 }
 if (event.keyCode==112)
 {
  //alert("This Alt Operation Is Not Allowed");
  event.keyCode=0; 
  return false;
 }
 if(event.keyCode==114 )
 {
  alert("This Operation Is Not Allowed");
  event.keyCode=0; 
  return false;
 }
 if(parseInt(event.button)==2)
 {
  alert("This Operation Is Not Allowed"); 
  return false;    
 }
 if((event.keyCode==116)||(event.keyCode==122)||(event.keyCode==18)||(event.keyCode==93)||(event.keyCode==16))
 {
  alert("This Operation Is Not Allowed");
  event.keyCode=0; 
  return false;
 }


 return true;
 }

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