function affiche_carre() { //v6.0
  var i,p,v,obj,args=affiche_carre.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
    obj.visibility=v; }
}
function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}
function lien_carre(){
}

function check(){
msg="";
if (document.form1.envoyeur.value == "")
{
	msg="Le champ de l'expéditeur n'est pas remplis";
}
else 
{
	if (!isEmail(document.form1.envoyeur.value))
		{msg="Votre mail est invalide";}
}
if(document.form1.nom.value == ""){msg=msg+"\n Le champ nom n'est pas remplis";}
if(document.form1.prenom.value == ""){msg=msg+"\n Le champ prenom n'est pas remplis";}
if(document.form1.corps.value == ""){msg=msg+"\n Le champ du message n'est pas remplis";}


if (msg=="")
{document.form1.submit();}
else
{alert(msg);}
}
function isEmail(email) 

{

            invalidChars = " ~\'^\`\"*+=\\|][(){}$&!#%/:,;";

            for (i=0;i<invalidChars.length;i++) 

                        {

                        badChar = invalidChars.charAt(i);

                        if (email.indexOf(badChar,0) > -1) {return false}

                        }

            lengthOfEmail = email.length;

            if ((email.charAt(lengthOfEmail - 1) == ".") || (email.charAt(lengthOfEmail - 2) == ".")) {return false}

            Pos = email.indexOf("@",1);

            if (email.charAt(Pos + 1) == ".") {return false}

            while ((Pos < lengthOfEmail) && ( Pos != -1)) 

                        {

                        Pos = email.indexOf(".",Pos);

                        if (email.charAt(Pos + 1) == ".") {return false}

                        if (Pos != -1) {Pos++;}

                        }

            atPos = email.indexOf("@",1);

            if (atPos == -1) {return false}

            if (email.indexOf("@",atPos+1) != -1) {return false}

            periodPos = email.indexOf(".",atPos);

            if (periodPos == -1) {return false}

            if (periodPos+3 > email.length) {return false}

            return true;

}