pu = [];
pu.window = null;

pu.open = function(url, name, width, height) {
   this.window = window.open(url, name, 'width=' + width + ',height=' + height + ',scrollbars=1');
   this.window.focus();
   return false;
}

pu.close = function() {
   this.window.close();
   return true;
}