Saisie d'url

Réponse acceptée !
<script language="javascript">
if (!document.getElementById) {
    if (document.all) {
        document.getElementById = function() {
            if (typeof document.all[arguments[0]] != "undefined") {
                return document.all[arguments[0]];
            }
            else {
                return null;
            }
        }
    }
    else if(document.layers){
        document.getElementById = function() {
            if (typeof document[arguments[0]] != "undefined") {
                return document[arguments[0]];
            }
            else {
                return null;
            }
        }
    }
}
</script>
<form onSubmit="window.location = document.getElementById('url').value; return false;">
<input type="buton"  name="url" id="url">
<input type="submit" value="GO">
</form>