Salut!
Revoici tes 2 tentatives, avec en gras les corrections:
1.
<html>
<head>
<script language="JavaScript">
function Agree(Terms) {
checkobj = Terms;
if ((document.donnee.agree.checked == true) || (document.donnee.accept.checked == true))
{ document.donnee.btn_valid.disabled = false;
}
else { document.donnee.btn_valid.disabled = true;
}
}
function go_go()
{
window.open('http://www.paypal.com/cgi-bin/cmd?paye_ton_inscription_ici','_Blank','')
}
</script>
</head>
<body>
<form name="donnee" action="Agree" method="post">
<input name="agree" type="checkbox" onClick="Agree(this)"> J'accepte...<br>
<input name="accept" type="checkbox" onClick="Agree(this)"> I agree...<br>
<input name="btn_valid" type="submit" value="Inscription" onclick="go_go()" disabled="true">
</form>
</body>
</html>
2.
<html>
<head>
<script language="JavaScript">
function Agree(Terms) {
checkobj = Terms;
if (document.donnee.agree.checked == true) { document.donnee.btn_valid.disabled = false;
}
else {
document.donnee.btn_valid.disabled = true;
} if (document.donnee.accept.checked == true) { document.donnee.btn_ok.disabled = false;
}
else {
document.donnee.btn_ok.disabled = true;
}
}
function go_go()
{
window.open('http://www.paypal.com/cgi-bin/cmd?paye_ton_inscription_ici','_Blank','')
}
</script>
</head>
<body>
<form name="donnee" action="Agree" method="post">
<input name="agree" type="checkbox" onClick="Agree(this)"> J'accepte...<br>
<input name="btn_valid" type="submit" value="Inscription" onclick="go_go()" disabled="true">
<hr>
<input name="accept" type="checkbox" onClick="Agree(this)"> I agree...<br>
<input name="btn_ok" type="submit" value="Inscription" onclick="go_go()" disabled="true">
</form>
</body>
</html>
Bon courage et @+