function protect(evt)
{
	if ( navigator.appName != 'Microsoft Internet Explorer' )
	{
		if ( evt.which != 3)
		{
			return true;
		}
	}
	alert('Sorry, but you cannot right-click on images on this page.');
	return false;
}

function trap()
{
	if ( document.images )
	{
		if ( navigator.appName != 'Microsoft Internet Explorer')
		{
			for (i = 0; i < document.images.length; i++)
			{
				document.images[i].onmousedown = protect;
			}
		}
		else
		{
			for (i = 0; i < document.images.length; i++)
			{
				document.images[i].oncontextmenu = protect;
			}
		}
	}
}