• i.e de web sayfası için print scr tuşunu disable etme

<html> 
<head> 
<script type="text/javascript"> 
function start(){
	block = setInterval("window.clipboardData.setData('text','')",20); 	
}
function stop(){
	clearInterval(block);
}
</script> 
</head> 

<body onload="start();"> 
YOU TRY TO COPY AND PASTE THIS SCREEN, AND ALL THE ACTIVE SCREENS 
<input type="button" onclick="stop();" value="stop blocking copy/paste!">

</body> 
</html>