<!--- begin 
// ========= Protect Alt,Ctrl ===============//
document.onkeydown=alert_keyprotect;
function alert_keyprotect(){
	var msg1="Alt/Ctrl disable.";
	if ((event.altKey==true) || (event.ctrlKey==true)){	
/////		alert(event.altKey+" - "+event.ctrlKey+" - "+event.keyCode);
		alert(msg1);
	}	
}	
// -->