function addEvent(obj, evType, fn, useCapture){
  if (obj.addEventListener){
    obj.addEventListener(evType, fn, useCapture);
    return true;
  } else if (obj.attachEvent){
    var r = obj.attachEvent("on"+evType, fn);
    return r;
  } else {
    alert("Handler could not be attached");
  }
}

var isSafari  = ((parseInt(navigator.productSub)>=20020000)&&     // detecting WebCore
               (navigator.vendor.indexOf("Apple Computer")!=-1));

function replaceSearchField() {
  // Replaces normal input text field with safari's neat search field
  if (!document.getElementById) return;
  var searchForm  = document.getElementById('search_form');
  var searchField = document.getElementById('title_subtitle_auth_isbn');
  if (!searchField) return;
  if (isSafari) {
    searchForm.className = 'issafari';
    searchField.setAttribute('type', 'search');
    searchField.setAttribute('autosave', 'randomhouse.search');
    searchField.setAttribute('results', '5');
  }
  
}

addEvent(window, 'load', replaceSearchField, false);