function get_trad_champ(champ) 
{
		switch(champ)
		{								
				case "nom" :
						return("Please enter your family name");
						break;	
				case "nom expeditaire" :
						return("Please enter your family name");
						break;
				case "nom destinataire" :
						return("Please enter your friend's family name");
						break;
				case "prenom" :
						return("Please enter your first name");
						break;
				case "code postal" :
						return("Please enter your post code");
						break;				
				case "fonction" :
						return("Please enter your job");
						break;
				case "type media" :
						return("Please enter the type of media");
						break;
				case "nom media" :
						return("Please enter the name of media outlet");
						break;
				case "site web" :
						return("Please enter your website");
						break;
				case "email" :
						return("The email that you have entered is not valid.\n Please type it in again.");
						break;
				case "email_expeditaire" :
						return("The email that you have entered is not valid.\n Please type it in again.");
						break;
				case "email_destinataire" :
						return("The email that you have entered for your friend is not valid. \n Please type it in again.");
						break;	
				case "adresse" :
						return("Please enter your address");
						break;	
				case "cp" :
						return("Please enter your post code");
						break;	
				case "ville" :
						return("Please enter your town");
						break;			
				case "pays" :
						return("Please enter your country");
						break;	
				case "message" :
						return("Please write your message");
						break;	
				case "querystring" :
						return("Please enter a word to be searched");
						break;
				case "numeric" :
						return("This field must be numerical and cannot contain any other characters.");
						break;	
				case "samedi" :		
						return("Sat.");
						break;
				case "dimanche" :		
						return("Sun.");
						break;
				default :
						return(champ);
		}
}

function get_trad_lib(lib) 
{
		switch(lib)
		{
				case "vide" :
						return("The field XX is obligatory. \n Please fill it in.");
						break;
				default : 
						return(lib)
		}
}

function replace_lib(expr,a,b) {
   var i=0
   while (i!=-1) {
      i=expr.indexOf(a,i);
      if (i>=0) {
         expr=expr.substring(0,i)+b+expr.substring(i+a.length);
         i+=b.length;
      }
   }
   return expr
}