regex question?

I'm using the following to try and replace urls in my html output: $newhrefs = preg_replace("/script.php\?(.*)=(.*)&(.*)=(.*)&(.*)=(.*)/", "script-$1-$2-$3-$4-$5-$6.html", $hrefs); This works fine as long as there are exactly 3 var=val pairs... not 1 or 2 or 4 or more... How can I write my expression to match 1 or more pairs??? For example: script.php?var=val script.php?var=val&var2=val2 script.php?var=val&var2=val2&var3=val3 etc...etc...etc... TIA, Shawn