function estimator() {
    estimator = window.open("estimator.html", "estimator", "menubar=0,resizable=0,width=600,height=900");
}
function open_map(s, c, st, z) {
    window.open("http://maps.google.com/maps?daddr=" + s + "," + c + "," + st + "," + z, "directons", "width=800px,height=500px,resizable=yes");
}