asp highlight text

hi guys,

i am using at the moment this type of regular expression to highlight a word from the search form.

function ShowBold(theField)
Set objRegExp= New RegExp
objRegExp.Pattern="(" & searchparam & ")"
objRegExp.IgnoreCase=True
objRegExp.Global=True
ShowBold=objRegExp.Replace(theField,"<b style=""background-color:#FFFF00; font-weight:bold;"">$1</b>")
end function

i would like to be able to highlight every ocurence of the world if there are more then one and the words are not beside each other.

Ex.
text: "i have a cd player that will play cd and also mp3"

if i search for cd player i get the "cd player" highlight it but not the cd on its own (the one in bold)