function ruota() {
  span = document.getElementById('topbar');
  if (span.style.left) {
   l = parseInt(span.style.left)-2;
   if (l<=-300) l=0;         
   span.style.left = l+'px';  
   //document.getElementById('dueparole').innerHTML = l+'px'; //per debug                 
  }
  else {        
   span.style.left = '0px';
  }
}
    
function swi() {
  document.getElementById('main').style.backgroundImage =  "url(images/_sfondo_.jpg)";
}  

function shrink() {
    var textDiv = document.getElementById("benvenuto");
    var textSpan = document.getElementById("benvenutonome");

    textSpan.style.fontSize = "14px";
    while(textSpan.clientHeight>22) //16
    {
            textSpan.style.fontSize = (parseInt(textSpan.style.fontSize) - 1)+'px';
    }
}

function onLoad() {
  setInterval ( 'ruota()', 50 );
  
  img = new Image();
  img.src = "images/_sfondo_.jpg";
  img.onload = swi;
  
  shrink()
  
  //rimpiazzo le immagini per IE6
  if ('Microsoft Internet Explorer'==navigator.appName)
     if (parseFloat(navigator.appVersion.substr(22))<7)
     {
      imgs = document.getElementsByTagName("img");
      limgs = imgs.length;
      for (n=0;n<limgs;n++) {
        ext = imgs[n].src.split('.').pop();
        if (ext=='png') {
            imgs[n].src = imgs[n].src.replace('.png','.gif');    
        }
      } 
      document.getElementById("totaleordine").style.backgroundImage = 'url(images/spallabot.gif)';      
    }
}