function verification()
{
	if(document.formulaire.prenom.value == "")
	{
		alert("Veuillez entrer votre prenom svp");
		document.formulaire.prenom.focus();
		return false;
	}
	else
	if(document.formulaire.nom.value == "")
	{
		alert("Veuillez entrer votre nom svp");
		document.formulaire.nom.focus();
		return false;
	}
	else
	if(document.formulaire.telephone.value == "")
	{
		alert("Veuillez entrer votre telephone svp");
		document.formulaire.telephone.focus();
		return false;
	}
	else
	
	adresse = document.formulaire.email.value;
	var place = adresse.indexOf("@",1);
	var point = adresse.indexOf(".",place+1);
	if ((place <= -1)||(adresse.length <=2)||(point <= 1))
	{
		alert('Veuillez entrer votre adresse e-mail svp');
		document.formulaire.email.focus();
		return(false);
	}
	else
	if(document.formulaire.texte.value == "")
	{
		alert("Veuillez entrer le texte de votre message svp");
		document.formulaire.texte.focus();
		return false;
		}
	else
	return true;
}


var ns6=document.getElementById&&!document.all

function restrictinput(maxlength,e,placeholder)
{

if (window.event&&event.srcElement.value.length>=maxlength)
return false
else if (e.target&&e.target==eval(placeholder)&&e.target.value.length>=maxlength){
var pressedkey=/[a-zA-Z0-9\.\,\/]/ 
if (pressedkey.test(String.fromCharCode(e.which)))
e.stopPropagation()
}
}

function countlimit(maxlength,e,placeholder){
var theform=eval(placeholder)
var lengthleft=maxlength-theform.value.length
var placeholderobj=document.all? document.all[placeholder] : document.getElementById(placeholder)
if (window.event||e.target&&e.target==eval(placeholder)){
if (lengthleft<0)
theform.value=theform.value.substring(0,maxlength)
placeholderobj.innerHTML=lengthleft
}
}

function displaylimit(thename, theid, thelimit){
var theform=theid!=""? document.getElementById(theid) : thename
var limit_text='<b><span id="'+theform.toString()+'">'+thelimit+'</span></b> caract&egrave;res restants.'
if (document.all||ns6)
document.write(limit_text)
if (document.all){
eval(theform).onkeypress=function(){ return restrictinput(thelimit,event,theform)}
eval(theform).onkeyup=function(){ countlimit(thelimit,event,theform)}
}
else if (ns6){
document.body.addEventListener('keypress', function(event) { restrictinput(thelimit,event,theform) }, true); 
document.body.addEventListener('keyup', function(event) { countlimit(thelimit,event,theform) }, true); 
}
}