function checkKey(){ //check for function keys
  if ((event.keyCode > 111 && event.keyCode < 124)){
		event.keyCode = 0;
        //window.status = event.keyCode;
        return false; // don't process by window
  }
}
document.onkeydown = checkKey;
function goHelp(){	
	return false;
}
window.onhelp = goHelp;

function ccb(){
if(clipboardData){
clipboardData.clearData();
}}
setInterval("ccb();", 1000);