function OpenAskForm(a) {
     
     var feedback_window = {
               width: 510,
               height: 436,               
               left: function() {return Math.ceil((screen.availWidth - this.width)/2)},
               top: function() {return Math.ceil((screen.availHeight - this.height)/2)},
               open: function(href) {
                    window.open(href, 'feedback', 'scrollbars=0,width='+this.width+',height='+this.height+',left='+this.left()+',top='+this.top()+',resizable=0,toolbar=0,location=0,status=0,menubar=0,directories=0');
               }
     };
     
     feedback_window.open(a);
}