search multiple fieldnames from one searchbox?

Hello!

Im trying to create a search box that will allow me to search an address, city, state and property highlights as keywords. Is there a way to have the form search multiple fields? Perhaps something like this:

name="property_highlights_keyword, address_keyword, city_keyword"


Just not sure of the syntax



<form method="post" action="/properties/searchResults.php">



<input class="propertySearchbox" width="250px" type="text" name="property_highlights_keyword" />
<input type="submit" value="Go" class="searchBtn">



</form>


Thanks,

Niki