var isNav = (window.navigator.appName.toLowerCase().indexOf("netscape")>=0);
var isIE = (window.navigator.appName.toLowerCase().indexOf("microsoft")>=0);
var isSafari = (window.navigator.userAgent.toLowerCase().indexOf("safari")>=0);

var url =  "http://mapping.redata.com/vp_atlas/AtlasServlet";

var saved_minx = minx;
var saved_miny = miny;
var saved_maxx = maxx;
var saved_maxy = maxy;

function getHTTPObject() {
    var xmlhttp;
    if (window.XMLHttpRequest) {
        xmlhttp = new XMLHttpRequest();
    // branch for IE/Windows ActiveX version
    } else if (window.ActiveXObject) {
        xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
    }
    return xmlhttp;
}

var http ;

var isWorking = false;