Add parameter to "navigation" url -

Hello,
I'm trying to add a parameter to my JUMP TO URL but it doesn't work.

basiclly i'm useing javascript there:
javascript:window.open('http:www.a.com?num=XXX');

i want to change the XXX with a value from the dataset.
I tried - javascript:window.open('http:www.a.com?num= + Fields!ME.Value ');
or - javascript:window.open('http:www.a.com?num= & Fields!ME.Value ');
it didn't worked :(

any help?

I manage to do it with a + .

The problem was that i wrote it as a line with out inverted commas (") and with out an equel sign (=) before.

silly me :)


Roy.