//cambia immagine banner
function bkg()
{
  if (document.getElementById){
var cur=Math.round(7*Math.random())
var tg = document.getElementById("banner");


	if (cur==0)
	{
         tg.className="banner1";
	}
	 else if (cur==1)
	{
	  tg.className="banner2";
	}
	 else if (cur==2)
	{
	  tg.className="banner3";
	}
	 else if (cur==3)
	{
	  tg.className="banner4";
	}
	 else if (cur==4)
	{
	  tg.className="banner5";
	}
	 else if (cur==5)
	{
	  tg.className="banner6";
	}
	 else if (cur==6)
	{
	  tg.className="banner7";
	}
	 else if (cur==7)
	{
	  tg.className="banner8";
	}
	 else if (cur==8)
	{
	  tg.className="banner9";
	}
	else
	{
	tg.className="banner10";
	}
  }
}

//funzione che parte on load
window.onload=function() { 
if(!document.getElementsByTagName) return;
l=document.getElementsByTagName("a");
for(i=0;i<l.length;i++)
   {
    if(l[i].className.indexOf("blank")!=-1)
      {
       l[i].onclick=function(){window.open(this.href);return(false)};
      }
   }

bkg();

        }