function blockBut(e)
{
	if (navigator.appName == 'Netscape' && (e.which == 3 || e.which == 2))
	{
		return false;
	}
	else if (navigator.appName == 'Microsoft Internet Explorer' && (event.button == 2))
		{
			return false;
		}
	}

	document.onmousedown=blockBut;
	document.oncontextmenu=new Function("return false");