Draw Tool Openlayer

drawtool_ol

var pointLayer = new OpenLayers.Layer.Vector("Point Layer");
var lineLayer = new OpenLayers.Layer.Vector("Line Layer");
var polygonLayer = new OpenLayers.Layer.Vector("Polygon Layer");
var boxLayer = new OpenLayers.Layer.Vector("Box layer");

var drawControls = {
	point: new OpenLayers.Control.DrawFeature(pointLayer,
		OpenLayers.Handler.Point),
	line: new OpenLayers.Control.DrawFeature(lineLayer,
		OpenLayers.Handler.Path),
	polygon: new OpenLayers.Control.DrawFeature(polygonLayer,
		OpenLayers.Handler.Polygon),
	box: new OpenLayers.Control.DrawFeature(boxLayer,
		OpenLayers.Handler.RegularPolygon, {
			handlerOptions: {
				sides: 4,
				irregular: true
			}
		}
	)
};

for(var key in drawControls) {
	map.addControl(drawControls[key]);
}