// Change once, to what you need
var action_url = document.getElementById("searchForm").action;



var so = new SWFObject("/images/searchbox.swf", "mymovie", "197", "24", "8", "#90A6B6");
   so.addParam("quality", "high");
   so.addParam("wmode", "transparent");
   so.addParam("salign", "top");
   so.addVariable("url", action_url);
   so.write("search_replace");