function click(e) {
	if (document.all) {
		if (event.button==1||event.button==2||event.button==3) {
			oncontextmenu='return false';
		}
	}
	if (document.layers) {
		if (e.which == 3) {
			oncontextmenu='return false';
		}
	}
}
if (document.layers) {
	document.captureEvents(Event.MOUSEDOWN);
}
document.onmousedown=click;
document.oncontextmenu = new Function("return false;")
var travel=true
var hotkey=67 /* hotkey即为热键的键值,是ASII码,这里99代表c键 */
if (document.layers)
document.captureEvents(Event.KEYDOWN)
function gogo(e){
	if (document.layers){
		if(e.which==hotkey&&travel){
			alert('无效操作！');
		}
	}
	else if (document.all){
		if (event.keyCode==hotkey&&event.ctrlKey){
			alert('无效操作！');
		}
	}
}
document.onkeydown=gogo