$(function() {
    var tool = 'images/ico_lupa.png';
    var goog = 'images/ico_google.png';
    var pdf = 'images/ico_pdf.png';
    var zumi = 'images/ico_zumi.png';
$('.tonus').tooltip({
    delay: 0, 
    showURL: false,
    track: true,
    fade: 400,
    bodyHandler: function() { 
        return $("<img/>").attr("src", tool); 
    } 
});
$('.google').tooltip({
    delay: 0, 
    showURL: false,
    track: true,
    fade: 400,
    bodyHandler: function() { 
        return $("<img/>").attr("src", goog); 
    } 
});
$('.pdf').tooltip({
    delay: 0, 
    showURL: false,
    track: true,
    fade: 400,
    bodyHandler: function() { 
        return $("<img/>").attr("src", pdf); 
    } 
});
$('.zumi').tooltip({
    delay: 0, 
    showURL: false,
    track: true,
    fade: 400,
    bodyHandler: function() { 
        return $("<img/>").attr("src", zumi); 
    } 
});

});