<!--
function PopupWindow()
{
  // variables
  this.popupWindow = null;
  this.url         = "about:blank";
  this.width       = 672;
  this.height      = 400;
  this.x           = 0;
  this.y           = 0;
  this.name        = null;
  this.properties  = "toolbar=no,location=no,status=no,menubar=no,scrollbars=yes,resizable,titlebar=no";
  // methods
  this.popUp       = PopupWindow_popUp;
}


function PopupWindow_popUp() {

  if (this.popupWindow == null || this.popupWindow.closed) {

    var windowName = this.name;
    if (!windowName) {
      var date   = new Date();
      windowName = "pop" + date.getTime();
    }

    this.popupWindow = window.open(this.url, windowName, this.properties + ",width=" + this.width + ",height=" +
                                   this.height + ",left=" + this.x + ",top=" + this.y);
  } else {
    this.popupWindow.focus();
  }
}
//-->