function bira (bild) {
javascript:document.getElementById('bira').style.visibility = "visible";
javascript:document.getElementById('bira_b').src = "images_g/"+ bild +"";
}

function bira_out () {
javascript:document.getElementById('bira').style.visibility = "hidden";
javascript:document.getElementById('bira_b').src = "images/ajax_loader.gif"
}