function swap(F_id,F_src) {

	

	var myObj = document.getElementById(F_id);

	

	if (myObj) {

		

		myObj.src = F_src;

		

	}

	

}



function showBox(F_id,F_class) {

	

	var myObj_Box  = document.getElementById(F_id);

	var myObj_Mask = document.getElementById("mask");

	

	if (myObj_Box && myObj_Mask) {

		

		myObj_Box.className  = F_class;

		myObj_Mask.className = "mask";

		

	}

	

}



function hideBox(F_id) {

	

	var myObj_Box  = document.getElementById(F_id);

	var myObj_Mask = document.getElementById("mask");

	

	if (myObj_Box && myObj_Mask) {

		

		myObj_Box.className  = "hidden";

		myObj_Mask.className = "hidden";

		

	}

	

}



function setFocus(F_id,F_txt1,F_txt2,F_isEmail) {

	

	var myObj = document.getElementById(F_id);

	

	if (myObj) {

		

		if (myObj.value == F_txt1) {

			

			myObj.value = F_txt2;

			//myObj.className = F_class;

			

		} 

		

	}

	

}



function valide() {

  

  var re_email = /^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*$/ ;

  var msg = "";

  

  var fromEmail = document.getElementById("votreemail");

  var toEmail =   document.getElementById("amiemail");

  var leForm =    document.getElementById("envoyerform");

  

  from_email = re_email.test(fromEmail.value);

  to_email =   re_email.test(toEmail.value);



  if (!from_email) {

    msg += "Votre adresse email est incorrecte\n" ;

  }

  if (!to_email) {

    msg += "L'email de votre ami est incorrecte" ;

  }

  

  if (msg!="") {

    alert(msg);

  } else {

    leForm.action="./";

    leForm.method="POST";

    leForm.submit();

  }

 

}