function Search() {
  form = document.getElementById("frm_search");
  if (form.edt_search_keyword.value == "") {
    alert('Please enter search text');
    form.edt_search_keyword.focus();
    return false;
  } else return true;
}
function _Search(frm) {
  form = document.getElementById(frm);
  if (form.edt_search.value == "") {
    alert('Please enter search text');
    form.edt_search.focus();
    return false;
  } else return true;
}

function newImage(arg) {
    if (document.images) {
        rslt = new Image();
        rslt.src = arg;
        return rslt;
    }
}

function changeImages() {
    if (document.images && (preloadFlag == true)) {
        for (var i=0; i<changeImages.arguments.length; i+=2) {
            document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
        }
    }
}

var preloadFlag = false;
function preloadImages() {
    if (document.images) {
        home_over = newImage("/resources/home-over.gif");
        contact_over = newImage("/resources/contact-over.gif");
        preloadFlag = true;
    }
}