[jQuery] [validate] Password validation works in FF3 but not in IE6

[jQuery] [validate] Password validation works in FF3 but not in IE6


Thanks for a great validation plugin!
Writing my first custom validation:
<script>
$(document).ready(function(){
jQuery.validator.addMethod("adminPwd", function(value,
element) {
return this.optional(element) || /^(?=.*\d)(?=.*[a-z])(?
=.*[A-Z])(?!.*\s)(?!.*\W).{8,255}$/.test(value);
}, "The password must contain lower case, upper case and
number(s) and be at least 8 characters");
$('#userForm').validate();
});
</script>
The aim is that the password must contain at least one lower case, one
upper case and one number. Spaces are not allowed. Lenght at least 8
characters
This works in FF3 but not in IE6. I suspect some regular expression
incompability in IE6 but I don't know how to debug it to pinpoint
exactly which part of the RE fails.
Any workarounds would be appretiated!
dk