If you stop certain pages from being indexed by google, itmakes your rank higher and results more useful. Your onward link page rank values are higher for the pages you really want indexing.

Stick this in the HTML Head sectin of your page or form:

<meta name="robots" content="noindex">

or

{<meta name="robots" content="noindex">}+@newline+

or

"<meta name=\"robots\" content=\"noindex\">"+@newline+