var windowHandle = null;
var windowHandle_closed = false;

function newWindow(theURL,winName,features) {
  windowHandle = window.open(theURL,winName,features);
    if (windowHandle.closed) {
        windowHandle_closed = false;
    }
}

function closeWindow() {
    if (windowHandle != null) {
        if (!windowHandle.closed) {
            windowHandle_closed = true;
            windowHandle.close();
        }
    }
}

/* call syntax
javascript:newWindow('home.html','popup','toolbar=1,directories=1,menubar=1,status=1,location=1,scrollbars=1,resizable=1,screenX=2,screenY=2,left=2,top=2');"
*/