var alart_mes="右クリック禁止です";
var alart_flg=true;
if (document.all || document.getElementById || document.layers) 
{
	if (document.layers) document.captureEvents(Event.MOUSEDOWN);
	document.onmousedown=mouse_down;
}
function mouse_down(e) 
{
	if (navigator.appName=="Microsoft Internet Explorer" && (event.button==2 || event.button==3) || navigator.appName=="Netscape" && (e.which==2 || e.which==3)) 
	{
		if (alart_flg || navigator.appVersion.indexOf("MSIE 4")!=-1 || navigator.userAgent.indexOf("Netscape6")!=-1) alert(alart_mes);
		return false;
	}
}