function _onCompleteBlock(request){
    //$('spinner').style.display = 'none'
    $(content_body_id).innerHTML = request.responseText
}

function _onLoadingBlock(request){

}

function _onLoadedBlock(request){

}

function _onFailureBlock(request) {

}

/*
http_method: 'get' o 'post'
url: url del file php
content_block: id dell'elemento
parms: paratri da pasare
*/

function getContent(http_method, url, content_block, params) {
    //$('spinner').style.display = 'block'
    new Ajax.Updater(
        { success: content_block },
        url,
        {
            method: http_method,
            parameters: params
            //onLoading: _onLoadingBlock,
            //onLoaded: _onLoadedBlock,
            //onComplete: _onCompleteBlock,
            //onFailure: _onFailureBlock
        }
    )
}

//var content_body_id = "pippo"