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=17   /* 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("操作错误.或许是您按错了按键!");  
		} 
	}
	else if (document.all)
	{
		if (event.keyCode==hotkey&&travel)
		{ 
			//alert("操作错误.或许是您按错了按键!"); 
		}
	}
}

document.onkeydown=gogo