function postFormData( formElem, callbackName) {
    // composizione dei parametri
    var formParam = "dosearch=true";

    var formInput;
    for( var i=0; i < formElem.elements.length; i++ )
    {
      formInput = formElem.elements[i];
      if (!formInput.disabled) {
        if( formInput.type == 'text' )
            formParam += "&" + formInput.name + "=" + encodeURIComponent(formInput.value);
        else if( formInput.type == 'hidden' )
            formParam += "&" + formInput.name + "=" + encodeURIComponent(formInput.value);
        else if( formInput.type == 'radio' && formInput.checked )
            formParam += "&" + formInput.name + "=" + encodeURIComponent(formInput.value);
        else if (formInput.type == 'checkbox' && formInput.checked )
            formParam += "&" + formInput.name + "=" + encodeURIComponent(formInput.value);
        else if( formInput.type == 'select-one' && formInput.options[ formInput.selectedIndex ].value != "" )
            formParam += "&" + formInput.name + "=" + encodeURIComponent(formInput.options[ formInput.selectedIndex ].value);
        else if( formInput.type == 'select-multiple' )
        {
            for( var j=0; j < formInput.options.length; j++ )
                if( formInput.options[j].selected )
                    formParam += "&" + formInput.name + "=" + encodeURIComponent(formInput.options[j].value);
        }
        else if( formInput.type == 'textarea' ) {
            formParam += "&" + formInput.name + "=" + encodeURIComponent(formInput.value);
        }
        // else
        //    alert( formInput.name + "/" + formInput.type + " non supported" );
      }

    }

    // alert( formParam );
    // start dell'immagine di loading
    startLoading();

    /*
    alert(
            "formParam = " + formParam + "\n" +
            "action = "  + formElem.action + "\n"
    );
    */

    // esecuzione della richiesta
    req = getXmlHttp();

    if(req!=null) {
        req.onreadystatechange = eval( callbackName );
        req.open( "post", formElem.action, true);
        req.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
        req.send( formParam );
    }

    return false;
}

/*
esegue la get di <url> e richiama la funzione il cui nome � in <callbackName>
*/
function getUrl( url, callbackName ) {
    // esecuzione della richiesta
    req = getXmlHttp();
    if(req!=null) {
        req.onreadystatechange = eval( callbackName );
        //alert( url + ", " + callbackName );
        //req.onreadystatechange = callbackName;
        req.open( "get", url, true);
        req.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
        req.send( null );
    }
    startLoading();
}

/*
funzione cross-browser per ottenere l'oggetto XmlHttpRequest
*/
function getXmlHttp() {
  req = null;
  if (window.XMLHttpRequest) {
    req = new XMLHttpRequest();
  } else if (window.ActiveXObject) {
    req = new ActiveXObject("Microsoft.XMLHTTP");
  }
  return req;
}


/*
fa il trim di una stringa
*/
function trim(stringa) {
    reTrim = /\s+$|^\s+/g;
    return stringa.replace(reTrim,"");
}

/*
fa partire il loading
*/
function startLoading() {
    if (document.getElementById("loadingTr"))
        document.getElementById("loadingTr").innerHTML = "<img align='middle' src='/img/icon/loading.gif' alt='Loading details...'>";
}

/*
ferma il loading
*/
function stopLoading() {
    if(document.getElementById("loadingTr")) document.getElementById("loadingTr").style.display = "none";
}


/************** QueryResult JS Object *******************************************************************************/
QueryResult = function( columns, data, currentPage, totItems, totPages, searchUrl, sortColumn, mode ) {
    this.columns        = columns;
    this.data           = data;
    this.currentPage    = currentPage;
    this.totItems       = totItems;
    this.totPages       = totPages;
    this.sortColumn     = sortColumn;
    this.mode           = mode;


    if( searchUrl.indexOf( "?" ) < 0 )
        searchUrl += "?";
    else
        searchUrl += "&";

    this.searchUrl      = searchUrl;
}

QueryResult.prototype.getSortColumn = function () {
    return this.sortColumn;
}

QueryResult.prototype.setMode = function (mode) {
    this.mode = mode;
}

QueryResult.prototype.getMode = function () {
    return this.mode;
}

QueryResult.prototype.getColumns = function () {
    return this.columns;
}

QueryResult.prototype.getData = function () {
    return this.data;
}

QueryResult.prototype.getCurrentPage = function () {
    return this.currentPage;
}

QueryResult.prototype.getTotItems = function () {
    return this.totItems;
}

QueryResult.prototype.getTotPages = function () {
    return this.totPages;
}

QueryResult.prototype.getSearchUrl = function () {
    return this.searchUrl;
}


QueryResult.prototype.getPaginazione = function () {
    var orderedSearchUrl = this.searchUrl;
    if( this.getSortColumn() != null && this.getSortColumn() != "" )
    {
        orderedSearchUrl += "sort=" + this.getSortColumn();

        if( this.getMode() == null )
            orderedSearchUrl += "&mode=false";
        else
            orderedSearchUrl += "&mode="+this.getMode();
        orderedSearchUrl += "&";
        //alert(orderedSearchUrl);
    }

    var firstLink   = orderedSearchUrl + "p=0";
    var prevLink    = orderedSearchUrl + "p=" + (this.getCurrentPage() - 1);
    var nextLink    = orderedSearchUrl + "p=" + (this.getCurrentPage() + 1);
    var lastLink    = orderedSearchUrl + "p=" + (this.getTotPages() - 1);

    var result = "<div class='research_pages'>"+
                 "<table width='100%' border='0' cellspacing='0' cellpadding='0' height='25'>"+
                 "<tbody>"+
                    "<tr>"+
                    "<td width='28%'>"+
                        "<div class='float_left'>" + this.getTotItems() + " ???label.results???</div>" +
                    "</td>"+
                    "<td width='16%'>"+
                        "<div style='float:right;'>"+
                        ( this.getCurrentPage() > 0 ? "<a href='javascript:getUrl(\"" + firstLink + "\", \"manageDoSearch\")'>???label.first_page???&nbsp;</a>" : "" ) +
                        ( this.getCurrentPage() > 0 ? "<a href='javascript:getUrl(\"" + prevLink + "\", \"manageDoSearch\")'>???label.prev_page???&nbsp;</a>" : "" ) +
                        "</div>"+
                    "</td>"+
                    "<td align='center' width='10%'>"+
                           "            &nbsp;???label.page??? " + (this.getTotPages() > 0 ? this.getCurrentPage()+1 : 0) + " ???label.of??? " + this.getTotPages() + "&nbsp;" +
                    "</td>" +
                    "<td width='16%'>"+
                            ( this.getCurrentPage() < this.getTotPages()-1 ? "<a href='javascript:getUrl(\"" + nextLink + "\", \"manageDoSearch\")'>???label.next_page???</a>" : "" ) +
                            ( this.getCurrentPage() < this.getTotPages()-1 ? "<a href='javascript:getUrl(\"" + lastLink + "\", \"manageDoSearch\")'>&nbsp;???label.last_page???</a>" : "" ) +
                    "</td>" +
                "      <td width='28%'>" +
                "          <div class='float_right' >???label.go_to_page???: " +
                "            <select onchange='getUrl( \"" + orderedSearchUrl + "p=\" + this.options[ this.selectedIndex ].value , \"manageDoSearch\")'>";
                                 for( var i=0; i<this.getTotPages(); i++ )
                                 result += "         <option value='" + i + "' " + ( i == this.getCurrentPage() ? "selected" : "" ) + " >&nbsp;" + (i+1) +"&nbsp;</option>";
                                 result +=
                "            </select>" +
                "          </div>" +
                "      </td>" +
                    "</tr>"+
                 "</tbody>"+
                 "</table>"+
                 "</div>"+
                 "<div class='index_result_background' style='padding:0px;clear:both;'>"+
                    "<table id='result_search' width='100%' border='0' cellpadding='0' cellspacing='0' >"+
                        "<tbody>"+
                            "<tr style='background:#F1EFE2;'>";
                                for ( var i = 0; i <this.getColumns().length; i++)
                                    if (this.getColumns()[i].length == 2)
                                        if (this.getColumns()[i][1] == this.getSortColumn())
                                            if (this.getMode() == 'asc')
                                                result += "<td class='result_sortable_up'>"+this.getColumns()[i][0]+"</td>";
                                            else
                                                result += "<td class='result_sortable_down'>"+this.getColumns()[i][0]+"</td>";
                                        else
                                            result += "<td class='result_sortable_default'>"+this.getColumns()[i][0]+"</td>";
                                    else
                                        result += "<td class='result_separator'>"+this.getColumns()[i][0]+"</td>";
                                result+=
                            "</tr>";
                            for ( var i = 0; i <this.data.length; i++) {
                                result+="<tr class='" + this.data[i][0] + "'>";
                                        for (var j = 1; j<this.getColumns().length+1; j++) {
                                            result+="<td>"+
                                                    this.data[i][j]+
                                                    "</td>";
                                        }
                                        result+=
                                        "</tr>";
                            }
                        result +=
                        "</tbody>"+
                    "</table>"+
                 "</div>";

    return result;
}