ช่วยดู code ป้องกันการค้ดลอกข้อมูลบนหน้า web ด้วยครับ

<script language="JavaScript1.2">
//Disable select-text script (IE4+, NS6+)
function disableselect(e){
return false
}
function reEnable(){
return true
}
//if IE4+
document.onselectstart=new Function ("return false")
//if NS6
if (window.sidebar){
document.onmousedown=disableselect
document.onclick=reEnable
document.all.course=reEnable
}

var message="What are you doing !";
if (navigator.appName == 'Microsoft Internet Explorer'){
	function NOclickIE(e) {
		if (event.button == 2 || event.button == 3) {
			alert(message);
			return false;
		}
		return true;
	}
	document.onmousedown=NOclickIE;
	document.onmouseup=NOclickIE;
	window.onmousedown=NOclickIE;
	window.onmouseup=NOclickIE;
}else{
	function NOclickNN(e){
		if (document.layers||document.getElementById&&!document.all){
			if (e.which==2||e.which==3){
			alert(message);
			return false;
			}
		}
	}
	if (document.layers){
		document.captureEvents(Event.MOUSEDOWN);
		document.onmousedown=NOclickNN;
	}
		document.oncontextmenu=new Function("alert(message);return false")
}
 
</script>