var bufferImage = new Array();

function Buffer(filename) {
    var i = bufferImage.length;
    bufferImage[i] = new Image();
    bufferImage[i].src = filename;
    }
function showImage1(f_pulsante, pulsante) {
    document.images[pulsante].src = f_pulsante;
    }
Image_Name = "SHOWPAD";
Buffer("images/news_on.jpg");