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		map.on('click', function (evt) {
				var viewResolution = (map.getView().getResolution());
                var url = pwLayer.getSource().getGetFeatureInfoUrl(
                    evt.coordinate,
                    viewResolution,
                    'EPSG:4326',
                    {'INFO_FORMAT': 'text/javascript'});
                $.ajax({
                    url: url,
                    data: "",
                    dataType: "jsonp",
					jsonpCallback:'parseResponse',
                    success: function (data) {
						console.log(data);
                    },
                    error: function () {
                        console.log("选取设备异常!");
                    }
                });
		});