var osTrackMkrs = new Array();
      var osTrackLegs = new Array();
    var osTrackMkrUid = 1;
var centerMarker = null;
var markers;
var vectorLayer;
var tDist = 0.0;
var tMins = 0.0;
var tHg = 0.0;
var cenLonlatx = 0;
var cenLonlaty = 0;
var cenGridref = '';

var speed = 4.0;

var screenOverlay;

        var iSize = new OpenLayers.Size(25, 25); 
        var iOffset = new OpenLayers.Pixel(-12, -12); 
        var iIcon = new OpenLayers.Icon('/images/XHair.gif', iSize, iOffset);

        var iTSize = new OpenLayers.Size(34, 34); 
        var iTOffset = new OpenLayers.Pixel(-18, -18); 
        var iTAnchorOffset = new OpenLayers.Pixel(18, 18); 



        var oTrackIcon = new OpenSpace.Icon('/images/midTrack.png', iTSize, iTOffset, null, iTAnchorOffset); 
        var oTrackStartIcon = new OpenSpace.Icon('/images/startTrack.png', iTSize, iTOffset, null, iTAnchorOffset); 
        var oTrackEndIcon = new OpenSpace.Icon('/images/endTrack.png', iTSize, iTOffset, null, iTAnchorOffset); 
        var oTrackBlankIcon = new OpenSpace.Icon('/images/blank.png', iTSize, iTOffset, null, iTAnchorOffset); 
		//var oTrackIcon = new OpenLayers.Icon('/images/midTrack.png', iTSize, iTOffset, iTAnchorOffset); 
        //var oTrackStartIcon = new OpenLayers.Icon('/images/startTrack.png', iTSize, iTOffset, iTAnchorOffset); 
        //var oTrackEndIcon = new OpenLayers.Icon('/images/endTrack.png', iTSize, iTOffset, iTAnchorOffset); 
        //var oTrackBlankIcon = new OpenLayers.Icon('/images/blank.png', iTSize, iTOffset, iTAnchorOffset); 



        var wTSize = new OpenLayers.Size(12, 20); 
        var wTOffset = new OpenLayers.Pixel(-6, -20); 
        var wTAnchorOffset = new OpenLayers.Pixel(6, 20); 


		var oWptIcon = new OpenSpace.Icon('/images/mm_20_green.png', wTSize, wTOffset, null, wTAnchorOffset); 
		//var oWptIcon = new OpenLayers.Icon('/images/mm_20_green.png', wTSize, wTOffset, wTAnchorOffset); 
		
		
        var iTrSize = new OpenLayers.Size(16, 16); 
        var iTrOffset = new OpenLayers.Pixel(-7, -9); 
        var iTrAnchorOffset = new OpenLayers.Pixel(7, 9); 


        var oTraceIcon = new OpenSpace.Icon('/images/dragcross.png', iTrSize, iTrOffset, null, iTrAnchorOffset); 
        //var oTraceIcon = new OpenLayers.Icon('/images/dragcross.png', iTrSize, iTrOffset, iTrAnchorOffset);