function verif_champs(){
	
	//Contrôle de l'email
	if(document.forml.firstname.value == "")
	{
		alert("Please fill all required fields");
		document.forml.firstname.focus();
		return false;
	}
	if(document.forml.surname.value == "")
	{
		alert("Please fill all required fields");
		document.forml.surname.focus();
		return false;
	}
	
	if(document.forml.company.value == "")
	{
		alert("Please fill all required fields");
		document.forml.company.focus();
		return false;
	}
	if(document.forml.tel.value == "")
	{
		alert("Please fill all required fields");
		document.forml.tel.focus();
		return false;
	}


	if(document.forml.email.value.indexOf('@') == -1)
	{
		alert("please enter a valid email address");
		document.forml.email.focus();
		return false;
	}
	if(document.forml.email.value.length <7)
	{
		alert("please enter a valid email address");
		document.forml.email.focus();
		return false;
	}
	

	//Contrôle du message du mail
   if(document.forml.message.value == "")
	{
		alert("Please fill all required fields");
		document.forml.message.focus();
		return false;
	}
		else(value == "null")
	{
		return false;
	}
}