var specialcase = ((navigator.userAgent.indexOf('Mac') != -1) || document.all)
var flag = 0;
var msg = 'This image is protected by copyright.\nWe request you not to copy it.';
var x,y,x1,y1,copyAttempt;


function init()
	{
	if (!(document.getElementById || document.all || document.layers)) return;
	if (specialcase && document.layers)
		{
		document.captureEvents(Event.MOUSEMOVE);
		document.onmousemove = special;
		}

	for (i=0;i<document.images.length;i++)
		{
		if (document.images[i].getAttribute('protect') == 'Y')
			{
			document.images[i].onmousedown = checkIt;
			document.images[i].onmouseup = function() {return false};

			if (specialcase)
				{
				document.images[i].onmousemove = special;
				document.images[i].onclick = clearIt;
				}
			}
		}
	}


function checkIt(e)
	{
	copyAttempt = 0;

	if (window.Event)
		{
		x = e.screenX;
		y = e.screenY;
		theButt = (e.which == 3);
		}
	else
		{
		x = window.event.clientX;
		y = window.event.clientY;
		theButt = (window.event.button == 2);
		}

	if (theButt)
		{
		copyAttempt = 1;
		flag = 0;
		alert(msg);
		return false; // NN4 only
		}

	if (specialcase)
		{flag = 1;}

	return false;
	}


function special(e)
	{
	theObj = '';

	if (window.Event)
		{
		x1 = e.screenX;
		y1 = e.screenY;
		if (e.target.parentNode) theObj = e.target.parentNode.tagName;
		}
	else
		{
		x1 = window.event.clientX;
		y1 = window.event.clientY;
		theObj = window.event.srcElement.parentElement.tagName;
		}

	var isLink = (theObj == 'A');
	if (flag && (!isLink || ((Math.abs(x-x1) > 10) || (Math.abs(y-y1) > 10))))
		{
		copyAttempt = 1;
		flag = 0;
		alert(msg);
		return false;
		}
	}


function clearIt()
	{
	flag = 0;
	if (copyAttempt)
		{
		copyAttempt = 0;
		return false;
		}
	}


onload=init;