function toggle_form_contact(){
 if(document.getElementById("form_contact").style.display == "none"){
 document.getElementById("form_contact").style.display = "block";
 }else{
 document.getElementById("form_contact").style.display = "none";
 }
}

function checkIfValideTxt(txt){
	var valide=false;
    txt = txt.replace(/\s*/,"");
    if(txt.length > 0){
        valide = true;
    }else{
        valide = false;
    }
    return valide;
}
function checkIfValideMail(txt){
	var valide=false;

	var maReg = new RegExp ( "^\\w[\\w+\.\-]*@[\\w\-]+\.\\w[\\w+\.\-]*\\w$", "gi" ) ;
	 
	if ( txt.search( maReg ) == -1 )
        valide = false;
	else
        valide = true;
    return valide;
}

function checkValues(){
  var valide=false;
  var message="";
  if(!checkIfValideTxt(document.form_contact.Nom.value))      message += "\n\t-le nom";
  if(!checkIfValideTxt(document.form_contact.Prenom.value))   message += "\n\t-le prénom";
  if(!checkIfValideMail(document.form_contact.Email.value))    message += "\n\t-une adresse mail correcte";
  if(!checkIfValideTxt(document.form_contact.Societe.value))  message += "\n\t-la société";
        
  if(message==""){
    valide=true;
    document.form_contact.form_ok.value="true";
  }else{
    message= "Vous devez renseigner :"+message;
    alert(message);
  }
  return valide;
}

function checkEmailValues(){
var valide=false;
var message="";
if(!checkIfValideMail(document.form_lost.Email.value)) message += "\n\t-une adresse mail correcte";
if(message==""){
valide=true;
}else{
 message= "Vous devez renseigner :"+message;
 alert(message);
 }
 return valide;
 }