navbar modification

[SiteTalkZone]

hi
what i want is
i added button on navbar
i added a text into phrase that i want to show
i need help
{vb:rawphrase varname} i want to show this if a user clicks on navbar button in a fashion of pop
so when user will click om navbar button my {vb:rawphrase varname} will shown without going any other page
how can i achieve this ?