var map;
function init(){
var options = {
    projection: new OpenLayers.Projection("EPSG:3857"),
    units: "m",
    maxResolution: 156543.0339,
    maxExtent: new OpenLayers.Bounds(-20037508.34, -20037508.34,
                                     20037508.34, 20037508.34),
   controls: [
                        new OpenLayers.Control.Navigation(),
                        new OpenLayers.Control.PanZoomBar(),
                        new OpenLayers.Control.Permalink(),
                        new OpenLayers.Control.ScaleLine(),
                        new OpenLayers.Control.KeyboardDefaults()
                    ],
	numZoomLevels: 14,


};
OpenLayers.Lang.setCode('en');

map = new OpenLayers.Map('map', options);


    var tms_sec = new OpenLayers.Layer.TMS( "Sectional Charts",
        "http://wms.chartbundle.com/tms/",
        {type: "png", layername: 'sec'} );
        var tms_tac = new OpenLayers.Layer.TMS( "Terminal Area Charts",
        "http://wms.chartbundle.com/tms/",
        {type: "png", layername: 'tac'});
        var tms_wac = new OpenLayers.Layer.TMS( "World Aeronautical Charts",
        "http://wms.chartbundle.com/tms/",
        {type: "png", layername: 'wac'});

       var tms_enrl = new OpenLayers.Layer.TMS( "IFR Enroute Low Charts",
        "http://wms.chartbundle.com/tms/",
        {type: "png", layername: 'enrl'});

      var tms_enra = new OpenLayers.Layer.TMS( "IFR Area Charts",
        "http://wms.chartbundle.com/tms/",
        {type: "png", layername: 'enra'});

      var tms_enrh = new OpenLayers.Layer.TMS( "IFR Enroute High Charts",
        "http://wms.chartbundle.com/tms/",
        {type: "png", layername: 'enrh'});
    var tms_secgrids = new OpenLayers.Layer.TMS( "Sectional Charts with Grid",
        "http://wms.chartbundle.com/tms/",
        {type: "png", layername: 'secgrids'} );
    var tms_tacgrids = new OpenLayers.Layer.TMS( "Terminal Area Charts with Grid",
        "http://wms.chartbundle.com/tms/",
        {type: "png", layername: 'tacgrids'} );

        var tms_wacgrids = new OpenLayers.Layer.TMS( "World Aeronautical Charts with Grid",
        "http://wms.chartbundle.com/tms/",
        {type: "png", layername: 'wacgrids'});


    map.addLayers([tms_sec, tms_tac, tms_wac, tms_enrl, tms_enra, tms_enrh,tms_secgrids,tms_tacgrids,tms_wacgrids]);
	ls = new MyLayerSwitcher;
    map.addControl(ls);
	ls.maximizeControl();
    var proj = new OpenLayers.Projection("EPSG:4326");
    var point = new OpenLayers.LonLat(-97, 38);
               if (!map.getCenter()) {
    map.setCenter(point.transform(proj, map.getProjectionObject()),3);
                }

}
//Inheriting of OpenLayers.Control.LayerSwitcher
MyLayerSwitcher.prototype = new OpenLayers.Control.LayerSwitcher;          
// Define sub-class
MyLayerSwitcher.prototype.constructor = MyLayerSwitcher;
function MyLayerSwitcher()
{
    OpenLayers.Control.LayerSwitcher.call(this);                                        
// derived constructor = call super-class constructor
}

MyLayerSwitcher.prototype.loadContents = function()                                
// redefine Method
{
    OpenLayers.Control.LayerSwitcher.prototype.loadContents.call(this);        
// Call super-class method 
    this.baseLbl.innerHTML = "Chart Type";                                  
//change title for base layers
    this.dataLbl.innerHTML = "Overlay";                                  
//change title for overlays (empty string "" is an option, too)
}




var print_wait_win = null;
function printMap(pagefmt) {
    // Wait messaye
    print_wait_win = window.open("pleasewait.html", "print_wait_win", "scrollbars=no, status=0, height=80, width=240, resizable=1");

    // fetch the extent and image size
    //    var mapview = document.getElementById('map').contentWindow.map;
    // var layers  = document.getElementById('map').contentWindow.layers;
    var mapview = map;
    var layers = map.layers;
    var bbox  = mapview.getExtent();
    bbox  = [bbox.left,bbox.bottom,bbox.right,bbox.top].join(',');
    var width   = mapview.getSize().w;
    var height  = mapview.getSize().h;
    // build a comma-joined list of layers
    var activelayers = [];
    for (i in layers) {
	if (!layers[i].getVisibility()) continue;
	if (!layers[i].calculateInRange()) continue;
	activelayers[activelayers.length] = layers[i].layername;
    }
    activelayers = activelayers.join(',');
    // open a window to our pure-Mapserver version
    var geturl = '/cgi-bin/printit.cgi?srs=EPSG%3A3857&';
    geturl += '&page=' + pagefmt;
    geturl += '&bbox=' + bbox;
    geturl += '&width=' + width+'&height='+height;
    geturl += '&layers=' + activelayers;
    OpenLayers.Request.GET( {
	    url: geturl , 
	    callback: function(request) {
		print_wait_win.close();
		window.open(request.responseText);
	    }
	}
	);
}
	
    function quickzoomrequest() {
	var fix = document.forms[0].qzfix.value;
    var geturl = '/cgi-bin/fixlocp.cgi?';
    geturl += 'f=' + fix;
    OpenLayers.Request.GET( {
	    url: geturl , 
	    callback: quickzoomresponse


		}
	)
	}
    function quickzoomresponse(req) {
  g =  new OpenLayers.Format.JSON();
    fixinfo = g.read(req.responseText);
    if (fixinfo.error == 0 ) {
    var proj = new OpenLayers.Projection("EPSG:4326");
    var point = new OpenLayers.LonLat(fixinfo.y, fixinfo.x);
    map.setCenter(point.transform(proj, map.getProjectionObject()),11);
    }
    }