Link labels and client scripts

I'm porting a large v7 map into a v9 solution.  We have several "help" links built using references which basically build the URL and options to do a ShowModalDialog or window.open.  However, it doesn't seem V9.2.1 supports calling client side scripts from .  I have been able to get direct showmodaldialog/etc. to work correctly in place of calling clientscript() instead.  Has anybody else encountered this as well?

I know we can specify a URL directly in a label, but that only accepts static values, a direct URL, but seems not functions like showmodaldialog, etc.  I was hoping to get away from separate html/asp files to display pop-up help, but I can look at that more after I get the bulk of things converted.