function click(e)
{
	if (document.all)	
	{
		if (event.button == 2)
		 	{alert("");return false;}
	}
	if (navigator.appName=="Netscape")	
	{
		if (e.which == 3)
		 	{alert("");return false;}
	}
} 
if (navigator.appName=="Netscape")
	document.captureEvents(Event.MOUSEDOWN);

document.onmousedown=click;