Toggle_Submit_Button.js

// Toggle Input Submit based on whether
// there are ANY input fields showing

function toggleInputSubmit() {
    var dis, showit = false;
    $$(".tag, .field a").each(function (el) {
        el.observe("click", function (event) {
            $$(".field").each(function (f) {
                dis = f.getStyle("display");
                if (dis !== "none") {
                    showit = true;
                    throw $break;
                } else {
                    showit = false;
                }
            });
          if (showit) {
            $("search_submit").show();
          } else {
            $("search_submit").hide();
          }
        });
    });
}