Moin!
Das hier ist es, was Dir die anderen versucht haben nahezubringen:
<html>
<head>
<script language="JavaScript" type="text/JavaScript" >
var old_value= null;
function storecheck (cb){
for (var i= cb.length; i--;) {
if ( ! cb[i].checked ) continue;
old_value= cb[i].value;
return;
}
}
function check( me ) {
if ( me.value == old_value ) {
alert( 'Noe... will ned!');
}
else {
alert( "Na gut!\n" + "Jetzt: " + me.value + "\nVorher: " + old_value );
old_value= me.value;
}
}
</script>
</head>
<body onload="storecheck(document.forms['mainform'].elements['cb'])">
<form method="post" name="mainform" action="http://www.google.de/" onsubmit="return false;">
<input onclick="check(this)" type="radio" name="cb" value="dies"/> mach dies<br/>
<input onclick="check(this)" type="radio" name="cb" value="das"/> mach das<br/>
<input onclick="check(this)" type="radio" name="cb" value="was anderes"/> mach was anderes<br/>
<input onclick="check(this)" type="radio" name="cb" value="erstmal nix" checked/> erstmal nix<br/>
</form>
</body>
</html>
Hilft's?
-- Skeeve