function trim(string) {
return string.replace(/(\s+$)|(^\s+)/g, "");
}

function do_search(submit) {
    var searchText = document.getElementById('search_text');
    var searchForm = document.getElementById('search_form');
    if (searchText.value == "search.." || trim(searchText.value) == "") {
        searchText.focus();
        alert('Please enter search text');
        return false;
    } else {
        var searchValue = trim(searchText.value);
            searchValue = searchValue.replace(/[^A-Za-z0-9 +-]/g, "");
            searchValue = searchValue.replace(/(\s+)/g, "_");
        searchForm.action += searchValue.toLowerCase();
        searchForm.submit();
    }
}


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;
}