OpenLayers Delete Feature Control Using Box Selection(inherits from OpenLayers.Control.SelectFeature)

gistfile1.js

var olDeleteControl = new OpenLayers.Control.SelectFeature( layerToDrawOn, {
                clickout: false, toggle: false,
                multiple: true, hover: false,
                toggleKey: "ctrlKey", // ctrl key removes from selection
                multipleKey: "shiftKey", // shift key adds to selection
                box: true
            });

            olDeleteControl.events.on({
                'boxselectionend': function(layers){
                    try {
                        layers.layers[0].removeFeatures(layers.layers[0].selectedFeatures);
                    }
                    catch(err) {
                        alert('Error deleting features.')
                    }
                }
            });

            openlayersMap.addControl(olDeleteControl );