function validForm(form, lang) {
  var valid = true;
  var inputs = form.getElementsByTagName("input");
  var textareas = form.getElementsByTagName("textarea");
  for (var i = 0; i < inputs.length; i++) {
    var input = inputs[i];
    if (input.name.match(/order_.*/)) {
      if (input.value == "") {
        input.style.backgroundColor = "#FF9800";
        valid = false;
      } 
      if (input.name.match(/order_email/) && input.value != "" && !(input.value.indexOf(".") > 2 && input.value.indexOf("@") > 0) ) {
	alert(lang == "fr" ? "Email Invalide" : "Invalid email");
        input.style.backgroundColor = "#FF9800";
        return false;
      }
      if (input.name.match(/order_phone/) && input.value != "" && (parseInt(input.value) + "" == "NaN") ) {
        input.style.backgroundColor = "#FF9800";
        return false;
      }
      if (valid)
	input.style.backgroundColor = "";
    }
  }
  for (var i = 0; i < textareas.length; i++) {
    var textarea = textareas[i];
    if (textarea.name.match(/order_.*/)) {
      if (textarea.value == "") {
	textarea.style.backgroundColor = "#FF9800";
	valid = false;
      }     
    }
  }
  if (!valid) {
    alert(lang == "fr" ? "Les champts en couleur sont obligatoires" : "The color fields are mandatory");
    return false;
  } else {
    return valid;
  }
}