currentMouseHOffset = "" ;
currentMouseVOffset = "" ;
initTrackMouse() ;
function initTrackMouse() {

	var isNS4=document.layers?true:false;
	var isIE=document.all?true:false;
	var isIE6=isIE&&document.getElementById?true:false;
	var isIE4=isIE&&!isIE6?true:false;
	var isNS6=!isIE6&&document.getElementById?true:false;
	var isNS=isNS4||isNS6;
	
	if(isNS4) {
		document.captureEvents(Event.MOUSEMOVE); 
		document.onmousemove=showMouseLocation; 
	} else if(isNS6) {
		document.addEventListener("mousemove", showMouseLocation, true);
	} else if(isIE) {
	   document.onmousemove=showMouseLocation;
	} 
}
	
function showMouseLocation(e) {

	//var isNS4=document.layers?true:false;
	var isIE=document.all?true:false;
	var isIE6=isIE&&document.getElementById?true:false;
	var isIE4=isIE&&!isIE6?true:false;
	//var isNS6=!isIE6&&document.getElementById?true:false;
	//var isNS=isNS4||isNS6;
	if (isIE4) {
		return true ;
	}
	
	if (document.all) {
		var mouseHOffset = event.clientX ;
		var mouseVOffset = event.clientY ;
	} else {
		var mouseHOffset = e.pageX ;
		var mouseVOffset = e.pageY ;
	}
	
	var theHScroll = 0;
	var theVScroll = 0;
	if (window.pageYOffset) {
		theHScroll = window.pageXOffset;
		theVScroll = window.pageYOffset;
	} else if (window.document.documentElement && window.document.documentElement.scrollTop) {
		theHScroll = window.document.body.scrollLeft;
		theVScroll = window.document.body.scrollTop;
	} else if (window.document.body) {
		theHScroll = window.document.body.scrollLeft;
		theVScroll = window.document.body.scrollTop;
	}

	if (browserType == "Internet Explorer") {
		mouseHOffset += theHScroll ;
		mouseVOffset += theVScroll ;
	}
	if (browserType == "Mozilla") {
		mouseVOffset -= 1 ;
		mouseHOffset -= 1 ;
	} else if (browserType == "Internet Explorer" && platformType == "Windows") {
		mouseHOffset  -= 2 ;
		mouseVOffset  -= 2 ;
	}
	currentMouseHOffset = mouseHOffset ;
	currentMouseVOffset = mouseVOffset ;
	
	if (document.getElementById('mapCanvas') && document.getElementById('latitude') ) {
		showMapLocation(mouseHOffset,mouseVOffset) ;
	}
}

function showMapLocation(mouseHOffset,mouseVOffset) {
	// check if map has actually been loaded, else return
	if (typeof map == 'undefined') {
		return false ;
	}

	if (document.getElementById('mapCanvas')) {
		mapLeft = removePx(document.getElementById('mapCanvas').style.left?document.getElementById('mapCanvas').style.left:'0px');
		mapTop = removePx(document.getElementById('mapCanvas').style.top?document.getElementById('mapCanvas').style.top:'0px');
		mapWidth = removePx(document.getElementById('mapCanvas').style.width);
		mapHeight = removePx(document.getElementById('mapCanvas').style.height) ;
		
		if (browserType == "Mozilla" ) {
			mapLeft -= 1 ;
			mapTop -= 1 ;
		}
		
		mapRight = mapLeft + mapWidth - 1 ;
		mapBottom = mapTop + mapHeight - 1 ;
	}


	selectionHorizontalOffset = mouseHOffset ;
	selectionVerticalOffset = mouseVOffset ;

	if ( mouseHOffset < mapLeft || mouseHOffset > mapRight ||  mouseVOffset < mapTop || mouseVOffset > mapBottom ) {
		document.getElementById('longitude').innerHTML = "" ;
		document.getElementById('latitude').innerHTML = "" ;
	} else {
		mapMouseHOffset = mouseHOffset - mapLeft ;
		mapMouseVOffset = mouseVOffset - mapTop ;
		var coordinatesInDegrees = map.fromContainerPixelToLatLng(new GPoint(mapMouseHOffset,mapMouseVOffset)) ;

		if (map && map.getZoom() > 12) {
			var showSeconds = true ;
		} else {
			var showSeconds = false ;
		}
		var longitude = convertToDegreesMinutesAndSeconds(coordinatesInDegrees.x,"longitude",showSeconds) ;
		var latitude = convertToDegreesMinutesAndSeconds(coordinatesInDegrees.y,"latitude",showSeconds) ;
		
		var latitude = "<p class='smallgray' style='margin-top:0; margin-bottom:0'>" + latitude + "</p>"
		var longitude = "<p class='smallgray' style='margin-top:0; margin-bottom:0'>" + longitude + "</p>" ;
		if (document.getElementById('latitude').innerHTML != latitude) {
			document.getElementById('latitude').innerHTML = latitude  ;
		}
		if (document.getElementById('longitude').innerHTML != longitude) {
			document.getElementById('longitude').innerHTML = longitude  ;
		}
		
		if (selectedMapTool && mousedownmarker && selectedMapTool == "maptoolrectangle") {
			updateRectangleSelection(coordinatesInDegrees) ;
		}

	}
}

function convertToDegreesMinutesAndSeconds(value,latitudeOrLongitude,showSeconds) {
	var degrees = "0&deg" ;
	var minutes = "" ;
	var direction = "" ;
	
	if (value > 0) {
		if (latitudeOrLongitude == "latitude") {
			var direction = " N" ;
		} else if (latitudeOrLongitude == "longitude") {
			var direction = " E" ;
		} 
	} else if (value < 0) {
		if (latitudeOrLongitude == "latitude") {
			var direction = " S" ;
		} else if (latitudeOrLongitude == "longitude") {
			var direction = " W" ;
		}
	}
	
	value = Math.abs(value) ;
	degrees = Math.floor(value)  ;
	minutes = value - degrees ;
	minutes = Math.floor(minutes*60) ;
	seconds = ((value - degrees)*60 )- minutes ;
	seconds = Math.floor(seconds*60) ;
	if (minutes > 0) {
		if (minutes < 10) {
			minutes = "0" + minutes ;
		}	
		minutes += "'" ;
	} else {
		minutes = "" ;
	}
	if (seconds > 0) {
		if (seconds < 10) {
			seconds = "0" + seconds ;
		}	
		seconds += "\"" ;
	} else {
		seconds = "" ;
	}
	
	if (degrees == 0 && minutes == "") {
		direction = "" ;
	}
	var coordinatesString = degrees + "&deg;" + minutes ;
	if (showSeconds == true) {
		coordinatesString += seconds  ;
	}
	coordinatesString += direction ;
	return coordinatesString ;
}

function removePx(pixelString) {
	if (pixelString.indexOf("px") != -1) {
		pixelString = pixelString.substr(0,pixelString.indexOf("px")) ;
	}
	return parseInt(pixelString) ;
}

function showStoredSelection(thisPolygon) {
	var coordinatePairs = thisPolygon.split(",") ;
	if (browserType != "Internet Explorer") {
		var points = new Array() ;
		for (var i = 0 ; i < coordinatePairs.length; i ++) {
			var theseCoordinates = coordinatePairs[i].split(" ") ;
			theseCoordinates = new GLatLng(theseCoordinates[1],theseCoordinates[0]) ;
			points.push(theseCoordinates) ;
		}
		map.addOverlay(new GPolyline(points, "#FFFF00", 2, 1));
	}
	
	for (var i = 0 ; i < coordinatePairs.length; i ++) {
		var theseCoordinates = coordinatePairs[i].split(" ") ;
		var thisLatitude = parseFloat(theseCoordinates[1]) ;
		var thisLongitude = parseFloat(theseCoordinates[0]) ;
		if (i == 0) {
			var minimumLatitude = thisLatitude ;
			var maximumLatitude = thisLatitude ;
			var minimumLongitude = thisLongitude ;
			var maximumLongitude = thisLongitude ;
			continue ;
		} 
		if (thisLatitude > maximumLatitude) {
			maximumLatitude = thisLatitude ;
		} else if (thisLatitude < minimumLatitude) {
			minimumLatitude = thisLatitude ;
		} 
		if (thisLongitude > maximumLongitude) {
			maximumLongitude = thisLongitude ;
		} else if (thisLongitude < minimumLongitude) {
			minimumLongitude = thisLongitude ;
		} 
	}
	var centerLatitude = ((minimumLatitude + maximumLatitude) / 2);
	var centerLongitude = ((minimumLongitude + maximumLongitude) / 2);
	
	var bounds = new GLatLngBounds();
	var corner1 = new GLatLng(minimumLatitude,minimumLongitude);
	bounds.extend(corner1);
	var corner2 = new GLatLng(maximumLatitude,maximumLongitude);
	bounds.extend(corner2);
	
	map.setZoom(map.getBoundsZoomLevel(bounds));
	var point = new GLatLng(centerLatitude,centerLongitude) ;
	map.setCenter(point);
}



// Create a base icon for all of our markers that specifies the
// shadow, icon dimensions, etc.
var baseIcon = new GIcon();
baseIcon.shadow = "images/mapicons/mapicon_reds.png";
baseIcon.iconSize = new GSize(32, 32);
baseIcon.shadowSize = new GSize(37, 34);
baseIcon.iconAnchor = new GPoint(9, 34);
baseIcon.infoWindowAnchor = new GPoint(9, 2);
baseIcon.infoShadowAnchor = new GPoint(18, 25);

// Creates a marker whose info window displays the letter corresponding
// to the given index.
function createMarker(point, inf) {
  // Create a lettered icon for this point using our icon class
  var markerIcon = new GIcon(baseIcon);
  markerIcon.image = "images/mapicons/mapicon_red.png";

  // Set up our GMarkerOptions object
  markerOptions = { icon:markerIcon };
  var marker = new GMarker(point, markerOptions);

  GEvent.addListener(marker, "click", function() {
	marker.openInfoWindowHtml("<b>" + inf.name + "</b><br>" + (inf.loc=="" ? "" : inf.loc + "<br>") + inf.geo);
  });
  return marker;
}

function addMarker(str,inf) {
	str = str.split(',');
	var latlng = new GLatLng(str[1],str[0]);
	map.addOverlay(createMarker(latlng, inf));
}

function dec2deg(val) {
	var dummy = val.split(".");

	if (dummy[1]!="") {
		var x = (val-dummy[0])*60;
	} else {
		var x = 0;
	}
	return dummy[0]+"&deg;"+Math.round(x,2)+"'";
}

function mapMarkerInfo(a,b,c,d,e) {
   this.name = a;
   this.loc = b;
   this.date = c;
   this.source = d;
   
   var dummy = e.split(",");

   f =
	(dummy[0].substr(0,1)=="-" ? dec2deg(dummy[0].substr(1)) + "W" : dec2deg(dummy[0]) + "E")+" "+
	(dummy[1].substr(0,1)=="-" ? dec2deg(dummy[1].substr(1)) + "S" : dec2deg(dummy[0]) + "N");

   this.geo = f;
}