function logout() {
	displayAlert('Question', 'Sign out of Who\'s There?', new Array('Are you sure?', ((document.cookie.indexOf('rememberMe=')>=0) ? 'The Remember Me feature on this computer will be removed if you click OK.' : '')), new Array({ lbl:'OK', auto:30, defaultBtn:true, click:function() {
		markOffline();
		location.href='http://www.whosthere.co.uk/home/authorise.asp?logout';
	} }, { lbl:'Cancel', key:27 }), true);
}


	
	//**********************************//
	//**							  **//
	//**           Tooltip            **//
	//**							  **//
	//**********************************//
	
	function tooltip(title, message) {
		$('tooltip').innerHTML = '<div class="pageBox">' + ((title!='') ? '<h2>' + title + '</h2>' : '') + '<div class="boxContent">' + message + '</div></div>';
		$('tooltip').style.display = 'block';
	}
	function killTT() {
		$('tooltip').innerHTML = '';
		$('tooltip').style.display = 'none';
	}
	function moveTooltip(e) {
		if ($('tooltip').style.display == 'block') {
			var e = (e) ? e : event;
			var sLeft, sTop, x, y, h, w, lEdge, bEdge;
			sLeft = (document.documentElement.scrollLeft) ? document.documentElement.scrollLeft : document.body.scrollLeft;
			sTop = (document.documentElement.scrollTop) ? document.documentElement.scrollTop : document.body.scrollTop;
			x = (e.pageX) ? e.pageX : e.clientX + sLeft;
			y = (e.pageY) ? e.pageY : e.clientY + sTop;
			h = $('tooltip').offsetHeight + 12;
			w = $('tooltip').offsetWidth + 12;
			lEdge = (document.documentElement.clientWidth) + sLeft;
			bEdge = (document.documentElement.clientHeight) + sTop;
			$('tooltip').style.left = ((x + w > lEdge) ? ((x > lEdge) ? lEdge-w+8 : x-w+8) : x+12) + 'px';
			$('tooltip').style.top = ((y + h > bEdge) ? ((y > bEdge) ? bEdge-h+8 : y-h+8) : y+12) + 'px';
		}
	}
	document.onmousemove = moveTooltip;
	



//**********************************//
//**							  **//
//**             Chat             **//
//**							  **//
//**********************************//

//Mark Online
makeXMLRequest('/_code/_asp/chat/changeOnlineStatus.asp', 's=on', null, null);
function markOffline() {
	makeXMLRequest('/_code/_asp/chat/changeOnlineStatus.asp', 's=off', null, null);
}

	function getWhosOnline() {
		makeXMLRequest('/_code/_asp/chat/whosOnline.json.asp', '', function(r) {
			var whosOnline = eval('(' + r + ')');
			if (whosOnline.memberCount == 0) {
				$('whosOnlineBtn').innerHTML = '<img src="/_images/buttons/16/user-grey.png"> <span>0 Members Online</span>';
				$('whosOnlineBtn').onclick = null;
				$('whosOnlineBtn').className = '';
				$('whosOnlineWindow').style.display = '';			
			} else {
				$('whosOnlineBtn').innerHTML = '<img src="/_images/buttons/16/user.png"> <span style="font-weight:bold;">' + whosOnline.memberCount + ' Member' + ((whosOnline.memberCount==1) ? '' : 's') + ' Online</span>';
				var winHTML = '';
				for (i=0; i<whosOnline.groups.length; i++) {
					winHTML += '<img src="_images/autoImgs/groupLogo.aspx?g=' + whosOnline.groups[i].groupId + '&s=16" alt="" title=""> ';
					winHTML += '<b>' + whosOnline.groups[i].groupName + '</b> (' + whosOnline.groups[i].members.length + ')';
					winHTML += '<ul>';
					for (j=0; j<whosOnline.groups[i].members.length; j++) {
						winHTML += '<li><img src="_images/buttons/16/' + whosOnline.groups[i].members[j].typeIcon + '" alt="" title=""> ';
						winHTML += whosOnline.groups[i].members[j].memberName + '</li>';
					}
					winHTML += '</ul>';
				}
				$('whosOnlineWindow').innerHTML = winHTML
				$('whosOnlineBtn').onclick = toggleWhosOnlineWindow;
				$('whosOnlineBtn').className = ($('whosOnlineBtn').className == 'whosOnlineBtnActive') ? 'whosOnlineBtnActive' : 'whosOnlineHoverBtn';
			}
		}, null);
	}
	
	function toggleWhosOnlineWindow() {
		if ($('whosOnlineBtn').className == 'whosOnlineHoverBtn') {
			$('whosOnlineBtn').className = 'whosOnlineBtnActive';
			$('whosOnlineWindow').style.display = 'block';
		} else {
			$('whosOnlineBtn').className = 'whosOnlineHoverBtn';
			$('whosOnlineWindow').style.display = '';
		}
	}



//**********************************//
//**							  **//
//**            Alerts            **//
//**							  **//
//**********************************//

function displayAlert(type, title, message, buttons, blackout) {

	$('alert').className = 'alert' + type;
	$('alertTitle').innerHTML = title;
	for (var i=0; i<message.length; i++) { $('alertMsg').innerHTML = ((i>0) ? $('alertMsg').innerHTML : '') + '<p>' + message[i] + '<'+'/p>'; }
	$('alert').style.top = '-' + $('alert').offsetHeight + 'px';
	$('alert').style.paddingBottom = (buttons) ? '3em' : '1em';
	alertKeys = new Array();
	if (buttons) {
		autoCloseAlertButton = null;
		defaultAlertButton = null;
		$('alertButtons').innerHTML = '';
		for (var i=0; i<buttons.length; i++) {
			var btn = document.createElement('input');
			btn.type = 'button';
			btn.onclick = (buttons[i].click) ? buttons[i].click : closeAlert;
			btn.value = buttons[i].lbl;
			if (navigator.platform.toLowerCase().indexOf('mac') >=0) { $('alertButtons').insertBefore(btn, $('alertButtons').firstChild); } else { $('alertButtons').appendChild(btn); }
			if (buttons[i].auto) { if (buttons[i].auto != 0) {
				autoCloseAlertButton = btn;
				btn.countdownValue = buttons[i].auto;
				btn.orgValue = btn.value
			} }
			if (buttons[i].defaultBtn) { defaultAlertButton = btn; }
			if (buttons[i].key) { alertKeys.push(registerKeys(buttons[i].key, ((buttons[i].click) ? buttons[i].click : closeAlert), true)); }
		}
	}
	
		if (blackout) { $('blackout').style.display = 'block'; }
		clearTimeout(displayAlertTimeout);
		clearTimeout(alertCountdownTimeout);
		registerResizableElement($('alert'), 'centre');
		registerResizableElement($('blackout'), 'fullScreen');
		displayAlertAnimate();
		if (window.ie6HacksAlertScroll) { ie6HacksAlertScroll(); }
	
}

function closeAlert() {
	
		clearTimeout(displayAlertTimeout);
		clearTimeout(alertCountdownTimeout);
		$('blackout').style.display = 'none';
		$('alert').style.top = (parseInt($('alert').style.top)-8) + 'px';
		if (parseInt($('alert').style.top) > -$('alert').offsetHeight) {
			setTimeout(closeAlert, 10);
		} else {
			$('alert').style.top = '-1000em';
			deregisterResizableElement($('alert'));
			deregisterResizableElement($('blackout'));
		}
		for (var i=0; i<alertKeys.length; i++) {
			deregisterKeys(alertKeys[i]);
		}
	
}


	function displayAlertAnimate() {
		$('alert').style.top = (parseInt($('alert').style.top)+8) + 'px';
		if (parseInt($('alert').style.top) < -3) {
			displayAlertTimeout = setTimeout(displayAlertAnimate, 10);
		} else {
			$('alert').style.top = '-2px';
			if (autoCloseAlertButton) { closeAlertCountdown(); }
			if (defaultAlertButton) { defaultAlertButton.focus(); }
		}
	}

	function closeAlertCountdown() {
		autoCloseAlertButton.value = autoCloseAlertButton.orgValue + ' (' + autoCloseAlertButton.countdownValue-- + ')';
		if (autoCloseAlertButton.countdownValue >= 0) {
			alertCountdownTimeout = setTimeout(closeAlertCountdown, 1000);
		} else {
			autoCloseAlertButton.click();
		}
	}

	var autoCloseAlertButton = null;
	var defaultAlertButton = null;
	var displayAlertTimeout, alertCountdownTimeout;
	var mousedownOnButton = null;
	var alertKeys;
	


	//**********************************//
	//**							  **//
	//**       Window Resizing        **//
	//**							  **//
	//**********************************//

	function resizeElements() {
		if (resizableElements.length > 0) {
			var h = 600;
			var w = 800;
			var bdy = document.getElementsByTagName('body')[0]; //for IE6 :-(
			if (typeof(window.innerWidth) == 'number') {
				h = window.innerHeight;
				w = window.innerWidth;
			} else if (document.documentElement && (document.documentElement.clientHeight)) {
				h = document.documentElement.clientHeight;
				w = document.documentElement.clientWidth;
			} else if (document.body && (document.body.clientHeight)) {
				h = document.body.clientHeight;
				w = document.body.clientWidth;
			}
			for (var i=0; i<resizableElements.length; i++) {
				var e = resizableElements[i].e;
				var scheme = resizableElements[i].scheme;
				if (scheme == 'fullScreen') {
					e.style.top = '0px';
					e.style.left = '0px';
					e.style.height = (h < bdy.offsetHeight) ? bdy.offsetHeight + 'px' : h + 'px';
					e.style.width = (w < bdy.offsetWidth) ? bdy.offsetWidth + 'px' : w + 'px';
				} else if (scheme.slice(0,5) == 'inset') {	
					e.style.top = scheme.slice(5) + 'px';
					e.style.left = scheme.slice(5) + 'px';
					e.style.height = (h - parseInt(scheme.slice(5))*2) + 'px';
					e.style.width = (w - parseInt(scheme.slice(5))*2) + 'px';
				} else if (scheme.slice(0,6) == 'centre') {
					e.style.left = parseInt((w-e.offsetWidth)/2) + 'px';
					if (scheme == 'centreThird') { e.style.top = parseInt((h-e.offsetHeight)/3) + 'px'; }
				}
			}
		}
	}
	function registerResizableElement(element, scheme) {
		resizableElements.push({ 'e': element, 'scheme': scheme });
		resizeElements();
	}
	function deregisterResizableElement(e) {
		for (var i=0; i<resizableElements.length; i++) {
			if (e === resizableElements[i].e) {
				resizableElements.splice(i,1);
			}
		}
	}
	var resizableElements = new Array();
	window.onresize = resizeElements;


	//**********************************//
	//**							  **//
	//**           Keyboard	          **//
	//**							  **//
	//**********************************//

	function getKeys(e) {
		accessibilityKeyUp(e);
		if (keyActions.length > 0) {
			if (!e) var e = window.event;
			if (e.keyCode) key = e.keyCode;
			else if (e.which) key = e.which;
			var keyFound = false;
			var blackout = (!($('blackout').style.display == '' || $('blackout').style.display == 'none'));
			for (var i=keyActions.length-1; i>=0; i--) {
				if (keyActions[i].key == key && !keyFound && ((blackout && keyActions[i].overBlackout) || !blackout)) {
					keyFound = true;
					keyActions[i].action();
				}
			}
		}
	}
	function registerKeys(keyCode, action, overBlackout) {
		var uid = new Date().valueOf();
		keyActions.push({ 'key': keyCode, 'action': action, 'overBlackout':overBlackout, 'uid':uid });
		return uid
	}
	function deregisterKeys(uid) {
		for (var i=0; i<keyActions.length; i++) {
			if (keyActions[i].uid == uid) {
				keyActions.splice(i,1);
			}
		}
	}
	var keyActions = new Array();
	document.onkeyup = getKeys;



//**********************************//
//**							  **//
//**      General Functions       **//
//**							  **//
//**********************************//


	function focusFirstFormElement() {
		var foundFirstElement = false;
		for (var i=0; i<document.forms.length; i++) {
			for (var j=0; j<document.forms[i].elements.length; j++) {
				if (document.forms[i].elements[j].tabIndex == 1 && !foundFirstElement) {
					document.forms[i].elements[j].focus();
					foundFirstElement = true;
				}
			}
		}
		if ($('frmCancel') && foundFirstElement) {
			registerKeys(27, function() { $('frmCancel').click(); }, false);
		}
	}


function $(e) { return document.getElementById(e); }


function makeXMLRequest(address, params, succeededCallback, failedCallback) {
	xmlRequest = newXMLRequest();
	if(xmlRequest) {
		xmlRequest.onreadystatechange = function() {
			if (xmlRequest.readyState == 4) {
				//alert(xmlRequest.responseText)
				if (xmlRequest.status == 200) {
					if (succeededCallback) { succeededCallback(xmlRequest.responseText) }
				} else { 
					if (failedCallback) {failedCallback() }
				}
			}
		}
		xmlRequest.open('POST', address, true);
		xmlRequest.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
		xmlRequest.send(params + ((params!='') ? '&' : '') + 't=' + new Date().valueOf());
	}
}
function newXMLRequest() {
	var xmlRequest = false;
	if(window.XMLHttpRequest) {
		try {
			xmlRequest= new XMLHttpRequest();
		} catch(e) {
			xmlRequest= false;
		}
	} else if(window.ActiveXObject) {
		try {
			xmlRequest= new ActiveXObject("Msxml2.XMLHTTP");
		} catch(e) {
			try {
				xmlRequest= new ActiveXObject("Microsoft.XMLHTTP");
			} catch(e) {
				xmlRequest= false;
			}
		}
	}
	return xmlRequest;
}