function popUp(url, name, options) {
    if (!options) {
        // default
        options = "width=600,height=480,status=yes,resizable=yes,scrollbars=yes";
    }
    var w = window.open(url, name, options);
    w.focus();
    return(w);
}

function g(id) { return document.getElementById(id); }

String.prototype.trim = function() {
  return this.replace(/^\s+|\s+$/g,"");
}
String.prototype.ltrim = function() {
  return this.replace(/^\s+/,"");
}
String.prototype.rtrim = function() {
  return this.replace(/\s+$/,"");
}