function swapimg(which){
    strUrl=location.href;
    
    strUrl=strUrl.substring(strUrl.lastIndexOf("/")+1);

    strUrl=strUrl.substring(0,strUrl.lastIndexOf("."));
    strUrl=strUrl.substring(strUrl.lastIndexOf("."),strUrl.length);
  //  alert(strUrl);
	urlname = which.src.substring(0,which.src.lastIndexOf("."));
	
	urlsingle=urlname.substring(urlname.lastIndexOf("/")+1);
	
	urlext = which.src.substring(which.src.lastIndexOf("."),which.src.length);
	//alert(urlname.substring(urlname.length-1,urlname.length));
	
	if (urlname.substring(urlname.length-1,urlname.length) == '1') 
	{
	 //   alert(strUrl);
	 //   alert(urlsingle.substring(0,urlsingle.length -1));
	    if (strUrl !=urlsingle.substring(0,urlsingle.length -1))
	    {
	        which.src = urlname.substring(0,urlname.length -1) + urlext
	    }
	    
	}
	else 
	{
	    which.src = urlname + '1' + urlext;
	}
	return false;
}

function startpage(){
	c = new Effect.Appear('menu', { duration: 0.6 , delay: 0.0}); 	
	b = new Effect.Appear('logo', { duration: 0.7, delay: 0.3});
	a = new Effect.Appear('titolo', { duration: 0.5, delay: 0.4});
	d = new Effect.Appear('content', { duration: 0.7 , delay: 0.5});
}