function validateEmail(entered) {
     apos=entered.indexOf("@");
     dotpos=entered.lastIndexOf(".");
     lastpos=entered.length-1;
     if (apos<1 || dotpos-apos<2 || lastpos-dotpos>3 || lastpos-dotpos<2) {
          return false;
     } else {
          return true;
     }
}

function validateNumber(x) {
     var anum=/(^\d+$)|(^\d+\.\d+$)/;
     if (anum.test(x)){
          return true;
     } else {
          return false;
     }
}

// Declaring required variables
var digits = "0123456789";
// non-digit characters which are allowed in phone numbers
var phoneNumberDelimiters = "()- ";
// characters which are allowed in international phone numbers
// (a leading + is OK)
var validWorldPhoneChars = phoneNumberDelimiters + "+";
// Minimum no of digits in an international phone no.
var minDigitsInIPhoneNumber = 10;

function isInteger(s) {   
     var i;
     for (i = 0; i < s.length; i++) {
          // Check that current character is number.
          var c = s.charAt(i);
          if (((c < "0") || (c > "9"))) return false; 
     }
     // All characters are numbers.
     return true;
}

function stripCharsInBag(s, bag) {
     var i;
     var returnString = "";
     // Search through string's characters one by one.
     // If character is not in bag, append to returnString.
     for (i = 0; i < s.length; i++) {
          // Check that current character isn't whitespace.
          var c = s.charAt(i);
          if (bag.indexOf(c) == -1) returnString += c;
     }
     return returnString;
}

function checkInternationalPhone(strPhone){
     s=stripCharsInBag(strPhone,validWorldPhoneChars);
     return (isInteger(s) && s.length >= minDigitsInIPhoneNumber);
}

function check(){
    
    var formElements = document.form.elements;
    
    for (i=0; i<formElements.length; i++) {
    
        if( (formElements[i].className == "requiredField" || formElements[i].title == "requiredField") && formElements[i].value == "" ){
            
            alert("Assurez-vous d'avoir rempli tout les champs")
            return false;
        }
        
        if( formElements[i].value != "" ) {
            
            if(formElements[i].alt == "email" ){
                
                if(!validateEmail(formElements[i].value) ){
                    
                    alert("L'adresse courriel est incorrect")
                    return false;
                }
            } 
            
            if(formElements[i].name == "tel" ){
                
                if(!checkInternationalPhone(formElements[i].value) ){
                    
                    alert("Le numéro de téléphone est incorrect")
                    return false;
                }
            }
            
            if(formElements[i].alt == "number" ){
                
                if(!validateNumber(formElements[i].value) ){
                    
                    alert("Assurez-vous qu'il y a que des chiffres et un « . »")
                    return false;
                }
            }
            
            if(formElements[i].name == "CV" ){
                
                elem=formElements[i].value
                l=elem.lastIndexOf('.')
                ext=elem.substring(l)
                
                if(ext!=".doc" && ext!=".docx" && ext!=".pdf"  && ext!=".xls" && ext!=".xlsx"){
                    alert("Format de votre document est invalide.")
                    alert(ext)
                    
                    return false
                }
            }
        }			  
    }
}

function SetMaxChar(champ, max, langue)
   {
   if (champ.value.length > max)
      {
      champ.value = champ.value.substring(0,max);
      if (langue == "en")
         alert("Your message has exceeded the maximum length for sending a page and has been automatically truncated to "+max+" characters.");
      else
         alert("Votre message dépasse le nombre de caractères permis et a été réduit à "+max+" caractères."); 
      }
   }