// JavaScript Document

function apriMenu(url)
{
  if (url == null || url == "") return;

  var iframe = document.getElementById("myFrame");

  if (iframe != null)
   {
    iframe.src=url;
   }
}

function setSize(size)
{
  var iframe = window.parent.document.getElementById("myFrame");
  if ( iframe != null )
    {
     iframe.style.height=size;
    }
}

function apriImage(from,to,cartella)
{
  var i = 0;
  var count = 0;
  for (i=from; i<to+1; i++) {
   count +=1;
    var iframe = document.getElementById("foto"+count);
    if (iframe != null)
      {
       iframe.src=cartella+"/"+i+".jpg";
      }
  }

}

function anteprima(idImage,cartella)
{
  var div, img, mini, srcImage;
  mini=document.getElementById(idImage);
  img=document.getElementById('imgFoto');
  img.src=mini.src.replace(cartella,'big/'+cartella);
  changeOpac(0,'anteprima');
  setTimeout(showImage,100);
}  // anteprima

function showImage()
{
  var div=document.getElementById('anteprima');
  div.style.display='block';
  opacity('anteprima', 0, 100, 500);

}

function hideImage()
{
	opacity('anteprima', 100, 0, 500);
  setTimeout(hideDiv,500);
}

function hideDiv()
{
        var div = document.getElementById('anteprima');
        div.style.display='none';
}

var images_dir = 'images/';
var over_prepend = '_over.gif';
var img_prepend = '_img';

function add_handlers() {
	var i, args,d, link, img, id, to_preload, function_string;
	d = document;
	args = add_handlers.arguments;
	to_preload = '';
	function_string = '';
	if(d.images) {
		for(i = 0; i <args.length; i++) {
			id = args[i];
			elem = d.getElementById(id)
			eval("elem.onmouseover = function() { MM_swapImage(\'"+id+img_prepend+"\',\'\',\'"+images_dir+id+over_prepend+"\',1); } ");
			d.getElementById(id).onmouseout = function() { MM_swapImgRestore(); };
			to_preload += "'"+images_dir+id+over_prepend+"',";
		}
	}
	to_preload = to_preload.substr(0,(to_preload.length-1));
	exec("MM_preloadImages("+to_preload+");");
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i]; }}
}



function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr;for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}



function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function opacity(id, opacStart, opacEnd, millisec) {
  //speed for each frame
  var speed = Math.round(millisec / 100);
  var timer = 0;

  //determine the direction for the blending, if start and end are the same nothing happens
  if(opacStart > opacEnd) {
    for(i = opacStart; i >= opacEnd; i--) {
      setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
      timer++;
    }
  } else if(opacStart < opacEnd) {
    for(i = opacStart; i <= opacEnd; i++)
      {
      setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
      timer++;
    }
  }
}

//change the opacity for different browsers
function changeOpac(opacity, id) {
  var object = document.getElementById(id).style;
  object.opacity = (opacity / 100);
  object.MozOpacity = (opacity / 100);
  object.KhtmlOpacity = (opacity / 100);
  object.filter = "alpha(opacity=" + opacity + ")";
}

function shiftOpacity(id, millisec) {
  //if an element is invisible, make it visible, else make it ivisible
  if(document.getElementById(id).style.opacity == 0) {
    opacity(id, 0, 100, millisec);
  } else {
    opacity(id, 100, 0, millisec);
  }
}

function blendimage(divid, imageid, imagefile, millisec) {
  var speed = Math.round(millisec / 100);
  var timer = 0;

  //set the current image as background
  document.getElementById(divid).style.backgroundImage = "url(" + document.getElementById(imageid).src + ")";

  //make image transparent
  changeOpac(0, imageid);

  //make new image
  document.getElementById(imageid).src = imagefile;

  //fade in image
  for(i = 0; i <= 100; i++) {
    setTimeout("changeOpac(" + i + ",'" + imageid + "')",(timer * speed));
    timer++;
  }
}

function currentOpac(id, opacEnd, millisec) {
  //standard opacity is 100
  var currentOpac = 100;

  //if the element has an opacity set, get it
  if(document.getElementById(id).style.opacity < 100) {
    currentOpac = document.getElementById(id).style.opacity * 100;
  }

  //call for the function that changes the opacity
  opacity(id, currentOpac, opacEnd, millisec)
}

var secondiIntervallo = 3;
var numeroFoto = 1106;

/*function CambiaImmagine(){
    var id = Math.round(Math.random() * numeroFoto);
    document.getElementById('imgRandom').src = 'foto2009/' + id + '.jpg';
} */

function CambiaImmagine(){
    var rndImg = Math.round(Math.random() * numeroFoto);
  var img = document.getElementById('imgRandom')
  img.src = '_b.gif';
  img.style.opacity = 0;
  shiftOpacity('imgRandom',500);
  img.src = 'foto2009/' + rndImg + '.jpg';
}