function setAction() {
    if (navigator.appName.indexOf('Netscape') > -1 || navigator.appName.indexOf("Microsoft") + 1) {
         document.getResults.action = document.getResults.lookin.options[document.getResults.lookin.selectedIndex].value;
         return true;
    }else {
        alert('Sorry, your browser does not support the changing of the action property of a form');
        return false;
    }

}