function get_trad_champ(champ) 
{
		switch(champ)
		{
				case "form_cours" :
						return("You must select at least one criterion");
						break;	
				case "form_equipe" :
						return("You must select at least one criterion");
						break;	
				case "nom" :
						return("Please enter your last name");
						break;	
				case "prenom" :
						return("Please enter your first name");
						break;					
				case "email" :
						return("The e-mail address you entered is not valid. \nPlease re-enter it.");
						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/city");
						break;			
				case "objet" :
						return("Please select the subject of your message");
						break;	
				case "message" :
						return("Please enter your message");
						break;	
				case "numeric" :
						return("This is a numerical field, it cannot contain any other type of character.");
						break;
				case "non_exist_dossier":
						return("None of the vehicles match the reference number that you entered, or the vehicle is no longer for sale.");
						break;	
				default :
						return(champ);
		}
}

function get_trad_lib(lib) 
{
		switch(lib)
		{
				case "vide" :
						return("XX is a compulsory field.\nPlease fill in this field.");
						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
}