var iscomplete=false

function checkform() {
iscomplete=true
for (i=0;i<=document.myform.elements.length-1;i++) {
if (document.myform.Nom.value=="") {iscomplete=false}
if (document.myform.Téléphone.value=="") {iscomplete=false}
if (document.myform.Courriel.value=="") {iscomplete=false}
}
if (!iscomplete) {
window.status="SVP, remplissez tous les champs ! Merci !"
if (document.all) {
submitbutton.style.visibility="HIDDEN"
iscomplete=false
}
if (document.layers) {
document.myform.submitbut.value="Pas encore !"
iscomplete=false
}
}
if (iscomplete) {
window.status="Bien ! Vous pouvez maintenant envoyer le formulaire!"
if (document.all) {
submitbutton.style.visibility="VISIBLE"
iscomplete=true
}
if (document.layers) {
document.myform.submitbut.value="Maintenant !"
iscomplete=true
}
}

var timer= setTimeout("checkform()",200)
}

function oksubmit() {
return iscomplete
}

<!--
function jmc2002change(color){
var el=event.srcElement
if (el.tagName=="INPUT"&&el.type=="submit")
event.srcElement.style.backgroundColor=color;

if (el.tagName=="INPUT"&&el.type=="reset")
event.srcElement.style.backgroundColor=color
}

function jumpto2(url){
window.location=url
}
//-->