function validator(){
    with (document){
      with (chard) {
       if ((txtcategory.options[txtcategory.selectedIndex].text == "-- select category --") && (txtinvestment.options[txtinvestment.selectedIndex].text == "-- select initial investment --") && (txtarea.options[txtarea.selectedIndex].text == "-- select franchise area --"))
        {
        alert("Please select at least one criteria.");
        txtcategory.focus();
         return (false);
        }
       else{
         document.chard.submit();
         return (true);
       } 
    }
   } 
  }