dynmap/web/map.js
2010-12-08 07:18:12 +00:00

764 lines
26 KiB
JavaScript

var setup = {
tileUrl: 'http://www.yourdomain.com/minecraft/tiles/',
updateUrl: 'http://www.yourdomain.com/minecraft/up/',
updateRate: 2000 //Seconds the map should poll for updates. (Seconds) * 1000. The default is 2000 (every 2 seconds).
};
/* THERE SHOULD BE NO NEED FOR MANUAL CONFIGURATION BEYOND THIS POINT */
/**
* This constructor creates a label and associates it with a marker.
* It is for the private use of the MarkerWithLabel class.
* @constructor
* @param {Marker} marker The marker with which the label is to be associated.
* @private
*/
function MarkerLabel_(marker) {
this.marker_ = marker;
this.labelDiv_ = document.createElement("div");
this.labelDiv_.style.cssText = "position: absolute; overflow: hidden;";
// Set up the DIV for handling mouse events in the label. This DIV forms a transparent veil
// in the "overlayMouseTarget" pane, a veil that covers just the label. This is done so that
// events can be captured even if the label is in the shadow of a google.maps.InfoWindow.
// Code is included here to ensure the veil is always exactly the same size as the label.
this.eventDiv_ = document.createElement("div");
this.eventDiv_.style.cssText = this.labelDiv_.style.cssText;
}
// MarkerLabel_ inherits from OverlayView:
MarkerLabel_.prototype = new google.maps.OverlayView();
/**
* Adds the DIV representing the label to the DOM. This method is called
* automatically when the marker's <code>setMap</code> method is called.
* @private
*/
MarkerLabel_.prototype.onAdd = function () {
var me = this;
var cMouseIsDown = false;
var cDraggingInProgress = false;
var cSavedPosition;
var cSavedZIndex;
var cLatOffset, cLngOffset;
var cIgnoreClick;
// Stops all processing of an event.
//
var cAbortEvent = function (e) {
if (e.preventDefault) {
e.preventDefault();
}
e.cancelBubble = true;
if (e.stopPropagation) {
e.stopPropagation();
}
};
this.getPanes().overlayImage.appendChild(this.labelDiv_);
this.getPanes().overlayMouseTarget.appendChild(this.eventDiv_);
this.listeners_ = [
google.maps.event.addDomListener(document, "mouseup", function (mEvent) {
if (cDraggingInProgress) {
mEvent.latLng = cSavedPosition;
cIgnoreClick = true; // Set flag to ignore the click event reported after a label drag
google.maps.event.trigger(me.marker_, "dragend", mEvent);
}
cMouseIsDown = false;
google.maps.event.trigger(me.marker_, "mouseup", mEvent);
}),
google.maps.event.addListener(me.marker_.getMap(), "mousemove", function (mEvent) {
if (cMouseIsDown && me.marker_.getDraggable()) {
// Change the reported location from the mouse position to the marker position:
mEvent.latLng = new google.maps.LatLng(mEvent.latLng.lat() - cLatOffset, mEvent.latLng.lng() - cLngOffset);
cSavedPosition = mEvent.latLng;
if (cDraggingInProgress) {
google.maps.event.trigger(me.marker_, "drag", mEvent);
} else {
// Calculate offsets from the click point to the marker position:
cLatOffset = mEvent.latLng.lat() - me.marker_.getPosition().lat();
cLngOffset = mEvent.latLng.lng() - me.marker_.getPosition().lng();
google.maps.event.trigger(me.marker_, "dragstart", mEvent);
}
}
}),
google.maps.event.addDomListener(this.eventDiv_, "mouseover", function (e) {
//me.eventDiv_.style.cursor = "pointer";
google.maps.event.trigger(me.marker_, "mouseover", e);
}),
google.maps.event.addDomListener(this.eventDiv_, "mouseout", function (e) {
//me.eventDiv_.style.cursor = me.marker_.getCursor();
google.maps.event.trigger(me.marker_, "mouseout", e);
}),
google.maps.event.addDomListener(this.eventDiv_, "click", function (e) {
if (cIgnoreClick) { // Ignore the click reported when a label drag ends
cIgnoreClick = false;
} else {
cAbortEvent(e); // Prevent click from being passed on to map
google.maps.event.trigger(me.marker_, "click", e);
}
}),
google.maps.event.addDomListener(this.eventDiv_, "dblclick", function (e) {
cAbortEvent(e); // Prevent map zoom when double-clicking on a label
google.maps.event.trigger(me.marker_, "dblclick", e);
}),
google.maps.event.addDomListener(this.eventDiv_, "mousedown", function (e) {
cMouseIsDown = true;
cDraggingInProgress = false;
cLatOffset = 0;
cLngOffset = 0;
cAbortEvent(e); // Prevent map pan when starting a drag on a label
google.maps.event.trigger(me.marker_, "mousedown", e);
}),
google.maps.event.addListener(this.marker_, "dragstart", function (mEvent) {
cDraggingInProgress = true;
cSavedZIndex = me.marker_.getZIndex();
}),
google.maps.event.addListener(this.marker_, "drag", function (mEvent) {
me.marker_.setPosition(mEvent.latLng);
me.marker_.setZIndex(1000000); // Moves the marker to the foreground during a drag
}),
google.maps.event.addListener(this.marker_, "dragend", function (mEvent) {
cDraggingInProgress = false;
me.marker_.setZIndex(cSavedZIndex);
}),
google.maps.event.addListener(this.marker_, "position_changed", function () {
me.setPosition();
}),
google.maps.event.addListener(this.marker_, "zindex_changed", function () {
me.setZIndex();
}),
google.maps.event.addListener(this.marker_, "visible_changed", function () {
me.setVisible();
}),
google.maps.event.addListener(this.marker_, "labelvisible_changed", function () {
me.setVisible();
}),
google.maps.event.addListener(this.marker_, "title_changed", function () {
me.setTitle();
}),
google.maps.event.addListener(this.marker_, "labelcontent_changed", function () {
me.setContent();
}),
google.maps.event.addListener(this.marker_, "labelanchor_changed", function () {
me.setAnchor();
}),
google.maps.event.addListener(this.marker_, "labelclass_changed", function () {
me.setStyles();
}),
google.maps.event.addListener(this.marker_, "labelstyle_changed", function () {
me.setStyles();
})
];
};
/**
* Removes the DIV for the label from the DOM. It also removes all event handlers.
* This method is called automatically when the marker's <code>setMap(null)</code>
* method is called.
* @private
*/
MarkerLabel_.prototype.onRemove = function () {
var i;
this.labelDiv_.parentNode.removeChild(this.labelDiv_);
this.eventDiv_.parentNode.removeChild(this.eventDiv_);
// Remove event listeners:
for (i = 0; i < this.listeners_.length; i++) {
google.maps.event.removeListener(this.listeners_[i]);
}
};
/**
* Draws the label on the map.
* @private
*/
MarkerLabel_.prototype.draw = function () {
this.setContent();
this.setTitle();
this.setStyles();
};
/**
* Sets the content of the label.
* The content can be plain text or an HTML DOM node.
* @private
*/
MarkerLabel_.prototype.setContent = function () {
var content = this.marker_.get("labelContent");
if (typeof content.nodeType === "undefined") {
this.labelDiv_.innerHTML = content;
this.eventDiv_.innerHTML = this.labelDiv_.innerHTML;
} else {
this.labelDiv_.appendChild(content);
content = content.cloneNode(true);
this.eventDiv_.appendChild(content);
}
};
/**
* Sets the content of the tool tip for the label. It is
* always set to be the same as for the marker itself.
* @private
*/
MarkerLabel_.prototype.setTitle = function () {
this.eventDiv_.title = this.marker_.getTitle() || "";
};
/**
* Sets the style of the label by setting the style sheet and applying
* other specific styles requested.
* @private
*/
MarkerLabel_.prototype.setStyles = function () {
var i, labelStyle;
// Apply style values from the style sheet defined in the labelClass parameter:
this.labelDiv_.className = this.marker_.get("labelClass");
this.eventDiv_.className = this.labelDiv_.className;
// Clear existing inline style values:
this.labelDiv_.style.cssText = "";
this.eventDiv_.style.cssText = "";
// Apply style values defined in the labelStyle parameter:
labelStyle = this.marker_.get("labelStyle");
for (i in labelStyle) {
if (labelStyle.hasOwnProperty(i)) {
this.labelDiv_.style[i] = labelStyle[i];
this.eventDiv_.style[i] = labelStyle[i];
}
}
this.setMandatoryStyles();
};
/**
* Sets the mandatory styles to the DIV representing the label as well as to the
* associated event DIV. This includes setting the DIV position, zIndex, and visibility.
* @private
*/
MarkerLabel_.prototype.setMandatoryStyles = function () {
this.labelDiv_.style.position = "absolute";
this.labelDiv_.style.overflow = "hidden";
// Make sure the opacity setting causes the desired effect on MSIE:
if (typeof this.labelDiv_.style.opacity !== "undefined") {
this.labelDiv_.style.filter = "alpha(opacity=" + (this.labelDiv_.style.opacity * 100) + ")";
}
this.eventDiv_.style.position = this.labelDiv_.style.position;
this.eventDiv_.style.overflow = this.labelDiv_.style.overflow;
this.eventDiv_.style.opacity = 0.01; // Don't use 0; DIV won't be clickable on MSIE
this.eventDiv_.style.filter = "alpha(opacity=1)"; // For MSIE
this.setAnchor();
this.setPosition(); // This also updates zIndex, if necessary.
this.setVisible();
};
/**
* Sets the anchor point of the label.
* @private
*/
MarkerLabel_.prototype.setAnchor = function () {
var anchor = this.marker_.get("labelAnchor");
this.labelDiv_.style.marginLeft = -anchor.x + "px";
this.labelDiv_.style.marginTop = -anchor.y + "px";
this.eventDiv_.style.marginLeft = -anchor.x + "px";
this.eventDiv_.style.marginTop = -anchor.y + "px";
};
/**
* Sets the position of the label. The zIndex is also updated, if necessary.
* @private
*/
MarkerLabel_.prototype.setPosition = function () {
var position = this.getProjection().fromLatLngToDivPixel(this.marker_.getPosition());
this.labelDiv_.style.left = position.x + "px";
this.labelDiv_.style.top = position.y + "px";
this.eventDiv_.style.left = this.labelDiv_.style.left;
this.eventDiv_.style.top = this.labelDiv_.style.top;
this.setZIndex();
};
/**
* Sets the zIndex of the label. If the marker's zIndex property has not been defined, the zIndex
* of the label is set to the vertical coordinate of the label. This is in keeping with the default
* stacking order for Google Maps: markers to the south are in front of markers to the north.
* @private
*/
MarkerLabel_.prototype.setZIndex = function () {
var zAdjust = (this.marker_.get("labelInBackground") ? -1 : +1);
if (typeof this.marker_.getZIndex() === "undefined") {
this.labelDiv_.style.zIndex = parseInt(this.labelDiv_.style.top, 10) + zAdjust;
this.eventDiv_.style.zIndex = this.labelDiv_.style.zIndex;
} else {
this.labelDiv_.style.zIndex = this.marker_.getZIndex() + zAdjust;
this.eventDiv_.style.zIndex = this.labelDiv_.style.zIndex;
}
};
/**
* Sets the visibility of the label. The label is visible only if the marker itself is
* visible (i.e., its visible property is true) and the labelVisible property is true.
* @private
*/
MarkerLabel_.prototype.setVisible = function () {
if (this.marker_.get("labelVisible")) {
this.labelDiv_.style.display = this.marker_.getVisible() ? "block" : "none";
} else {
this.labelDiv_.style.display = "none";
}
this.eventDiv_.style.display = this.labelDiv_.style.display;
};
/**
* @name MarkerWithLabelOptions
* @class This class represents the optional parameter passed to the {@link MarkerWithLabel} constructor.
* The properties available are the same as for <code>google.maps.Marker</code> with the addition
* of the properties listed below. To change any of these additional properties after the labeled
* marker has been created, call <code>google.maps.Marker.set(propertyName, propertyValue)</code>.
* <p>
* When any of these properties changes, a property changed event is fired. The names of these
* events are derived from the name of the property and are of the form <code>propertyname_changed</code>.
* For example, if the content of the label changes, a <code>labelcontent_changed</code> event
* is fired.
* <p>
* @property {string|Node} [labelContent] The content of the label (plain text or an HTML DOM node).
* @property {Point} [labelAnchor] By default, a label is drawn with its anchor point at (0,0) so
* that its top left corner is positioned at the anchor point of the associated marker. Use this
* property to change the anchor point of the label. For example, to center a 50px-wide label
* beneath a marker, specify a <code>labelAnchor</code> of <code>google.maps.Point(25, 0)</code>.
* (Note: x-values increase to the right and y-values increase to the bottom.)
* @property {string} [labelClass] The name of the CSS class defining the styles for the label.
* Note that style values for <code>position</code>, <code>overflow</code>, <code>top</code>,
* <code>left</code>, <code>zIndex</code>, <code>display</code>, <code>marginLeft</code>, and
* <code>marginTop</code> are ignored; these styles are for internal use only.
* @property {Object} [labelStyle] An object literal whose properties define specific CSS
* style values to be applied to the label. Style values defined here override those that may
* be defined in the <code>labelClass</code> style sheet. If this property is changed after the
* label has been created, all previously set styles (except those defined in the style sheet)
* are removed from the label before the new style values are applied.
* Note that style values for <code>position</code>, <code>overflow</code>, <code>top</code>,
* <code>left</code>, <code>zIndex</code>, <code>display</code>, <code>marginLeft</code>, and
* <code>marginTop</code> are ignored; these styles are for internal use only.
* @property {boolean} [labelInBackground] A flag indicating whether a label that overlaps its
* associated marker should appear in the background (i.e., in a plane below the marker).
* The default is <code>false</code>, which causes the label to appear in the foreground.
* @property {boolean} [labelVisible] A flag indicating whether the label is to be visible.
* The default is <code>true</code>. Note that even if <code>labelVisible</code> is
* <code>true</code>, the label will <i>not</i> be visible unless the associated marker is also
* visible (i.e., unless the marker's <code>visible</code> property is <code>true</code>).
*/
/**
* Creates a MarkerWithLabel with the options specified in {@link MarkerWithLabelOptions}.
* @constructor
* @param {MarkerWithLabelOptions} [opt_options] The optional parameters.
*/
function MarkerWithLabel(opt_options) {
opt_options = opt_options || {};
opt_options.labelContent = opt_options.labelContent || "";
opt_options.labelAnchor = opt_options.labelAnchor || new google.maps.Point(0, 0);
opt_options.labelClass = opt_options.labelClass || "markerLabels";
opt_options.labelStyle = opt_options.labelStyle || {};
opt_options.labelInBackground = opt_options.labelInBackground || false;
if (typeof opt_options.labelVisible === "undefined") {
opt_options.labelVisible = true;
}
this.label = new MarkerLabel_(this); // Bind the label to the marker
// Call the parent constructor. It calls Marker.setValues to initialize, so all
// the new parameters are conveniently saved and can be accessed with get/set.
// Marker.set triggers a property changed event (called "propertyname_changed")
// that the marker label listens for in order to react to state changes.
google.maps.Marker.apply(this, arguments);
}
// MarkerWithLabel inherits from <code>Marker</code>:
MarkerWithLabel.prototype = new google.maps.Marker();
MarkerWithLabel.prototype.setMap = function (theMap) {
// Call the inherited function...
google.maps.Marker.prototype.setMap.apply(this, arguments);
// ... then deal with the label:
this.label.setMap(theMap);
};
/* generic function for making an XMLHttpRequest
* url: request URL
* func: callback function for success
* type: 'text' by default (callback is called with response text)
* otherwise, callback is called with a parsed XML dom
* fail: callback function for failure
* post: if given, make a POST request instead of GET; post data given
*
* contenttype: if given for a POST, set request content-type header
*/
function makeRequest(url, func, type, fail, post, contenttype)
{
var http_request = false;
type = typeof(type) != 'undefined' ? type : 'text';
fail = typeof(fail) != 'undefined' ? fail : function() { };
if(window.XMLHttpRequest) {
http_request = new XMLHttpRequest();
} else if(window.ActiveXObject) {
http_request = new ActiveXObject("Microsoft.XMLHTTP");
}
if(type == 'text') {
http_request.onreadystatechange = function() {
if(http_request.readyState == 4) {
if(http_request.status == 200) {
func(http_request.responseText);
} else {
fail(http_request);
}
}
}
} else {
http_request.onreadystatechange = function() {
if(http_request.readyState == 4) {
if(http_request.status == 200) { func(http_request.responseXML); } else {
fail(http_request);
}
}
}
}
if(typeof(post) != 'undefined') {
http_request.open('POST', url, true);
if(typeof(contenttype) != 'undefined')
http_request.setRequestHeader("Content-Type", contenttype);
http_request.send(post);
} else {
http_request.open('GET', url, true);
http_request.send(null);
}
}
var config = {
tileUrl: setup.tileUrl,
updateUrl: setup.updateUrl,
tileWidth: 128,
tileHeight: 128,
updateRate: setup.updateRate,
zoomSize: [ 128, 128, 256 ]
};
function MCMapProjection() {
}
MCMapProjection.prototype.fromLatLngToPoint = function(latLng) {
var x = (latLng.lng() * config.tileWidth)|0;
var y = (latLng.lat() * config.tileHeight)|0;
if(map.zoom == 0) {
x += config.tileWidth / 2;
}
return new google.maps.Point(x, y);
};
MCMapProjection.prototype.fromPointToLatLng = function(point) {
var x = point.x;
if(map.zoom == 0)
x -= config.tileWidth / 2;
var lng = x / config.tileWidth;
var lat = point.y / config.tileHeight;
return new google.maps.LatLng(lat, lng);
};
function fromWorldToLatLng(x, y, z)
{
var dx = +x;
var dy = +y - 127;
var dz = +z;
var px = dx + dz;
var py = dx - dz - dy;
var lng = -px / config.tileWidth / 2 + 0.5;
var lat = py / config.tileHeight / 2;
return new google.maps.LatLng(lat, lng);
}
function mcMapType() {
}
var tileDict = new Array();
var lastSeen = new Array();
function tileUrl(tile, always) {
if(always) {
var now = new Date();
return config.tileUrl + tile + '.png?' + now.getTime();
} else if(tile in lastSeen) {
return config.tileUrl + tile + '.png?' + lastSeen[tile];
} else {
return config.tileUrl + tile + '.png?0';
}
}
function imgSubst(tile) {
if(!(tile in tileDict))
return;
var src = tileUrl(tile);
var t = tileDict[tile];
t.src = src;
t.style.display = '';
t.onerror = function() {
setTimeout(function() {
t.src = tileUrl(tile, 1);
}, 1000);
t.onerror = '';
}
}
mcMapType.prototype.tileSize = new google.maps.Size(config.tileWidth, config.tileHeight);
mcMapType.prototype.minZoom = 0;
mcMapType.prototype.maxZoom = 2;
mcMapType.prototype.getTile = function(coord, zoom, doc) {
var img = doc.createElement('IMG');
img.onerror = function() { img.style.display = 'none'; }
img.style.width = config.zoomSize[zoom] + 'px';
img.style.height = config.zoomSize[zoom] + 'px';
img.style.borderStyle = 'none';
if(zoom > 0) {
var tilename = "t_" + (- coord.x * config.tileWidth) + '_' + coord.y * config.tileHeight;
} else {
var tilename = "zt_" + (- coord.x * config.tileWidth * 2) + '_' + coord.y * config.tileHeight * 2;
}
tileDict[tilename] = img;
var url = tileUrl(tilename);
img.src = url;
//img.style.background = 'url(' + url + ')';
//img.innerHTML = '<small>' + tilename + '</small>';
return img;
}
var markers = new Array();
var lasttimestamp = 0;
var followPlayer = '';
var lst;
var plistbtn;
var lstopen = true;
var oldplayerlst = '[Connecting]';
function mapUpdate()
{
makeRequest(config.updateUrl + lasttimestamp, function(res) {
var rows = res.split('\n');
var loggedin = new Array();
var showWarps = document.getElementById('showWarps').checked;
var showMarkers = document.getElementById('showMarkers').checked;
lasttimestamp = rows[0];
delete rows[0];
var playerlst = ''
for(var line in rows) {
var p = rows[line].split(' ');
loggedin[p[0]] = 1;
if(p[0] == '') continue;
if(p.length == 4) {
if(playerlst != '') playerlst += '<br />';
playerlst += '<img id="icon_' + p[0] + '" class="plicon" src="' + (p[0] == followPlayer ? 'follow_on.png' : 'follow_off.png') + '" onclick="plfollow(' + "'" + p[0] + "'" + ')" alt="" /> <a href="#" onclick="plclick(' + "'" + p[0] + "'" + ')">' + p[0] + '</a>';
if(p[0] == followPlayer) {
map.setCenter(fromWorldToLatLng(p[1], p[2], p[3]));
}
if(p[0] in markers) {
var m = markers[p[0]];
var converted = fromWorldToLatLng(p[1], p[2], p[3]);
m.setPosition(converted);
} else {
var converted = fromWorldToLatLng(p[1], p[2], p[3]);
var marker = new MarkerWithLabel({
position: converted,
map: map,
labelContent: p[0],
labelAnchor: new google.maps.Point(-14, 10),
labelClass: "labels",
clickable: false,
flat: true,
icon: new google.maps.MarkerImage('marker.png', new google.maps.Size(28, 28), new google.maps.Point(0, 0), new google.maps.Point(14, 14))
});
markers[p[0]] = marker;
}
} else if(p.length == 6) {
var image = 'sign.png';
if (p[1] == 'marker')
{
image = 'watch.png';
}
if(p[0] in markers) {
var m = markers[p[0]];
if (showWarps == false) {
m.setMap(null);
continue;
}
else if (m.map == null) {
m.setMap(map);
}
var converted = fromWorldToLatLng(p[3], p[4], p[5]);
m.setPosition(converted);
} else {
if (showWarps == false) {
continue;
}
var converted = fromWorldToLatLng(p[3], p[4], p[5]);
var marker = new MarkerWithLabel({
position: converted,
map: map,
labelContent: p[0],
labelAnchor: new google.maps.Point(-14, 10),
labelClass: "labels",
clickable: false,
flat: true,
icon: new google.maps.MarkerImage(image, new google.maps.Size(28, 28), new google.maps.Point(0, 0), new google.maps.Point(14, 14))
});
markers[p[0]] = marker;
}
} else if(p.length == 2) {
lastSeen['t_' + p[0]] = lasttimestamp;
lastSeen['zt_' + p[1]] = lasttimestamp;
imgSubst('t_' + p[0]);
imgSubst('zt_' + p[1]);
}
}
if(playerlst != oldplayerlst) {
oldplayerlst = playerlst;
lst.innerHTML = playerlst;
}
for(var m in markers) {
if(!(m in loggedin)) {
markers[m].setMap(null);
delete markers[m];
}
}
setTimeout(mapUpdate, config.updateRate);
}, 'text', function() { alert('failed to get update data'); } );
}
window.onload = function initialize() {
lst = document.getElementById('lst');
plistbtn = document.getElementById('plistbtn');
var mapOptions = {
zoom: 1,
center: new google.maps.LatLng(0, 1),
navigationControl: true,
navigationControlOptions: {
style: google.maps.NavigationControlStyle.SMALL
},
scaleControl: false,
mapTypeControl: false,
streetViewControl: false,
mapTypeId: 'mcmap',
backgroundColor: '#000'
};
map = new google.maps.Map(document.getElementById("mcmap"), mapOptions);
mapType = new mcMapType();
mapType.projection = new MCMapProjection();
map.zoom_changed = function() {
mapType.tileSize = new google.maps.Size(config.zoomSize[map.zoom], config.zoomSize[map.zoom]);
};
google.maps.event.addListener(map, 'dragstart', function(mEvent) {
plfollow('');
});
map.dragstart = plfollow('');
map.mapTypes.set('mcmap', mapType);
map.setMapTypeId('mcmap');
mapUpdate();
}
function plistopen() {
if(lstopen) {
lstopen = false;
lst.style.display = 'none';
lst.style.visibility = 'hidden';
plistbtn.src = 'list_off.png';
} else {
lstopen = true;
lst.style.display = '';
lst.style.visibility = '';
plistbtn.src = 'list_on.png';
}
}
function plclick(name) {
if(name in markers) {
if(name != followPlayer) plfollow('');
map.setCenter(markers[name].getPosition());
}
}
function plfollow(name) {
var icon;
if(followPlayer == name) {
icon = document.getElementById('icon_' + followPlayer);
if(icon) icon.src = 'follow_off.png';
followPlayer = '';
return;
}
if(followPlayer) {
icon = document.getElementById('icon_' + followPlayer);
if(icon) icon.src = 'follow_off.png';
followPlayer = '';
}
if(!name) return;
icon = document.getElementById('icon_' + name);
if(icon) icon.src = 'follow_on.png';
followPlayer = name;
if(name in markers) {
map.setCenter(markers[name].getPosition());
}
}
//remove item (string or number) from an array
function removeItem(originalArray, itemToRemove) {
var j = 0;
while (j < originalArray.length) {
// alert(originalArray[j]);
if (originalArray[j] == itemToRemove) {
originalArray.splice(j, 1);
} else { j++; }
}
// assert('hi');
return originalArray;
}