Netscape and javascript

[wernerh]

Why doesnt this work when brosing with Netscape 6:
Nothing happens, the validation never executes!

<script ID=clientEventHandlersJS LANGUAGE=javascript>
<!--
function form1_onsubmit() {
//Check that NO fields are BLANK
if (form1.UserID.value == ""){
window.alert ("Username must be entered!");
form1.UserID.value = "";
form1.UserID.focus();
return false;
}
if (form1.password.value == ""){
window.alert ("Password must be entered!");
form1.password.focus();
return false;
}

}
//-->
</script>