function toggleBgImg(state) {
        var imgOver = new Image;
        var imgOut = new Image;
        imgOver = 'http://www.chichitza.com/generale/images/buton_down1.png';
        imgRest = 'http://www.chichitza.com/generale/images/buton_up1.png';
        if(state == 'over') {
                document.getElementById('submitBtn').style.backgroundImage = 'url('+imgOver+')';
        } else {
                document.getElementById('submitBtn').style.backgroundImage = 'url('+imgRest+')';
        }
}

function toggleBgImg_2(state) {
        var imgOver = new Image;
        var imgOut = new Image;
        imgOver = 'http://www.chichitza.com/generale/images/buton_down1.png';
        imgRest = 'http://www.chichitza.com/generale/images/buton_up1.png';
        if(state == 'over') {
                document.getElementById('submitBtn_2').style.backgroundImage = 'url('+imgOver+')';
        } else {
                document.getElementById('submitBtn_2').style.backgroundImage = 'url('+imgRest+')';
        }
}