<script type="text/javascript">
		function copy() { alert('禁止复制') } 
		function copy1() { if (event.button == 2) { alert('禁止复制') } } 
		function ctrl() { if (event.ctrlkey) { alert('禁止复制') } } 
		document.onselectstart = copy; 
		document.onmousedown = copy1;
		document.onkeydown = ctrl; 
		</script>