function saveMapPosition(cookieName) {
    var mapzoom = map.getZoom();
    var mapcenter = map.getCenter();
    var maplat = mapcenter.lat();
    var maplng = mapcenter.lng();
    var cookiestring = maplat + "_" + maplng + "_" + mapzoom;
    var exp = new Date();
    //set it 30 days from now 
    exp.setTime(exp.getTime() + (1000 * 60 * 60 * 24 * 30));
    setCookie(cookieName, cookiestring, exp);
}

function loadMapPosition(cookieName) {
    var loadedstring = getCookie(cookieName);
    if (loadedstring.length > 0) {
        var splitstr = loadedstring.split("_");
        map.setCenter(new GLatLng(parseFloat(splitstr[0]),
	    parseFloat(splitstr[1])), parseFloat(splitstr[2]));
    }
}

function setCookie(name, value, expires) {
    document.cookie = name + "=" + escape(value) + "; path=/" +
	    ((expires == null) ? "" : "; expires=" + expires.toGMTString());
}

function getCookie(c_name) {
    if (document.cookie.length > 0) {
        c_start = document.cookie.indexOf(c_name + "=");
        if (c_start != -1) {
            c_start = c_start + c_name.length + 1;
            c_end = document.cookie.indexOf(";", c_start);
            if (c_end == -1) c_end = document.cookie.length;
            return unescape(document.cookie.substring(c_start, c_end));
        }
    }
    return "";
}