//style map for polygons
    var styleMap = new OpenLayers.StyleMap({
        "default":{
            fillColor: "#0000ff",
            fillOpacity: 0.0,
            strokeColor: "#ff0000",
            strokeWidth:2,
            strokeDashstyle:"solid",
            pointRadius:5,
            graphicName:"cross"
        },
         "temporary":{//no fill on drag
            fillColor: "#0000ff",
            fillOpacity: 0.0,
            strokeColor: "#ff0000",
            strokeWidth:2
        },
         "select":{
            fillColor: "#0000ff",
            fillOpacity: 0.0,
            strokeColor: "#000000",
            strokeDashstyle:"dashdot",
            strokeWidth:4,
            graphicName:"cross"

        }
    });