function Validator()
{  
   if ((document.forms[0].elements[2].checked)||(document.forms[0].elements[6].checked)||(document.forms[0].elements[9].checked)||(document.forms[0].elements[12].checked)||(document.forms[0].elements[13].checked))
   {  
      if (document.forms[0].elements[20].value == "")
	  {  
	     alert("Dear visitor, \nyou must enter 4 digits for the year field.");
     	 document.forms[0].elements[20].focus();
    	 return (false);
      }
 	  if (document.forms[0].elements[20].value.length < 4)
  	  {  
	     alert("Dear visitor, \nyou must enter 4 digits for the year field.");
     	 document.forms[0].elements[20].focus();
     	 return (false);
      }
   }
   
   if ((document.forms[0].elements[3].checked)||(document.forms[0].elements[4].checked)||(document.forms[0].elements[5].checked)||(document.forms[0].elements[7].checked)||(document.forms[0].elements[8].checked)||(document.forms[0].elements[10].checked)||(document.forms[0].elements[11].checked)||(document.forms[0].elements[14].checked)||(document.forms[0].elements[15].checked)||(document.forms[0].elements[16].checked)||(document.forms[0].elements[17].checked)||(document.forms[0].elements[18].checked)||(document.forms[0].elements[19].checked))
   {  
      if (document.forms[0].elements[20].value == "")
	  {  
	     alert("Dear visitor, \nyou must enter at least 5 letters for the selected field.");
     	 document.forms[0].elements[20].focus();
    	 return (false);
      }
 	  if (document.forms[0].elements[20].value.length < 5)
  	  {  
	     alert("Dear visitor, \nyou must enter at least 5 letters for the selected field.");
     	 document.forms[0].elements[20].focus();
     	 return (false);
      }
   }   
  
   if (document.forms[0].elements[0].value == "") 
   { 
      if (document.forms[0].elements[0].value == "")
	  {
	     alert("Veuillez complèter le champ 'Paroisse\nPlease complete the field 'Paroisse'.");
         document.forms[0].elements[0].focus();
         return (false);
	  };
   };

  
};