function search_focus(event, w) {
  var src = event.srcElement || event.target;
  if (src) {
    src.className = "";
    if (src.value == w) src.value = "";
  }
}

function search_blur(event, w) {
  var src = event.srcElement || event.target;
  if (src && (src.value == "")) {
    src.value = w;
    src.className = "inactive";
  }
}