// JavaScript Document

/***********************************************
* Fading Scroller- © Dynamic Drive DHTML code library (www.dynamicdrive.com)
* This notice MUST stay intact for legal use
* Visit Dynamic Drive at http://www.dynamicdrive.com/ for full source code
***********************************************/

var delay = 4000; //set delay between message change (in miliseconds)
var maxsteps = 20; // number of steps to take to change from start color to endcolor
var stepdelay = 30; // time in miliseconds of a single step
//**Note: maxsteps*stepdelay will be total time in milliseconds of fading effect
var startcolor = new Array(0,0,0); // start color (red, green, blue)
var endcolor = new Array(255,255,255); // end color (red, green, blue)

var fcontent=new Array();
begintag='<div style="font: normal 10px Verdana; padding: 3px;">'; //set opening tag, such as font declarations
//fcontent[3]="<center><a href='http://www.istoreto.it/istituto/ist_5xmille.htm' class='B'><br><br><b>5 per mille</b><br><br>Contribuisci anche tu alle attività che svolgiamo in questo Istituto<br></a></center>";
fcontent[0]="<center><a href='didattica.htm#cit' class='B'><br>17 marzo <br>Casa cantoniera Colle del Lys<br>Ultima giornata del corso di formazione<br><b>Educare alla cittadinanza attraverso la memoria dei luoghi</b></a></center>";
fcontent[1]="<center><a href='istituto.htm' class='B'><br><br><br><b>L’Istituto cerca volontari <br>disponibili a collaborare</b><br></a></center>";
fcontent[2]="<center><a href='http://metarchivi.istoreto.it/' class='B'><br><br><b>Consulta online <br>l´archivio storico dell´Istituto<br>con A R C H O S</b></a></center>";
fcontent[3]="<center><a href='agenda.htm#mar' class='B'><br><br>Per maggiori informazioni sulle iniziative in corso<br><br><b>consulta l'Agenda</b></a></center>";
fcontent[4]="<center><a href='didattica/2701_home.htm#mostr' class='B'><br>27 gennaio -20 marzo<br>Torino, Archivio di Stato-Sezioni Riunite<br><br>Mostra <b>A noi fu dato in sorte questo tempo 1938-1947</b></a></center>";
fcontent[5]="<center><a href='didattica/2701_home.htm#semi' class='B'><br>16 marzo<br>Torino, Museo Diffuso<br><br>Seminario <br><b>Le mostre come strumenti didattici. Istruzioni per l’uso</b></a></center>";
fcontent[6]="<center><a href='agenda.htm#asoc' class='B'><br><br>23 marzo<br>Torino, Istoreto<br><br><b>Assemblea annuale dei Soci</b></a></center>";
closetag='</div>';
fcontent[7]="<center><a href='agenda.htm#pecc' class='B'><br>23 marzo<br>Torino, Palazzo dell’Università<br><br>Presentazione del volume<br><b>Aurelio Peccei: un protagonista del Novecento</b></a></center>";
closetag='</div>';

var fwidth='210px'; //set scroller width
var fheight='90px'; //set scroller height

var fadelinks=1;  //should links inside scroller content also fade like text? 0 for no, 1 for yes.

///No need to edit below this line/////////////////

var ie4=document.all&&!document.getElementById;
var DOM2=document.getElementById;
var faderdelay=0;
var index=Math.floor(Math.random()*fcontent.length);


/*Rafael Raposo edited function*/
//function to change content
function changecontent(){
  if (index>=fcontent.length)
    index=0
  if (DOM2){
    document.getElementById("fscroller").style.color="rgb("+startcolor[0]+", "+startcolor[1]+", "+startcolor[2]+")"
    document.getElementById("fscroller").innerHTML=begintag+fcontent[index]+closetag
    if (fadelinks)
      linkcolorchange(1);
    colorfade(1, 15);
  }
  else if (ie4)
    document.all.fscroller.innerHTML=begintag+fcontent[index]+closetag;
  index++
}

// colorfade() partially by Marcio Galli for Netscape Communications.  ////////////
// Modified by Dynamicdrive.com

function linkcolorchange(step){
  var obj=document.getElementById("fscroller").getElementsByTagName("A");
  if (obj.length>0){
    for (i=0;i<obj.length;i++)
      obj[i].style.color=getstepcolor(step);
  }
}

/*Rafael Raposo edited function*/
var fadecounter;
function colorfade(step) {
  if(step<=maxsteps) {	
    document.getElementById("fscroller").style.color=getstepcolor(step);
    if (fadelinks)
      linkcolorchange(step);
    step++;
    fadecounter=setTimeout("colorfade("+step+")",stepdelay);
  }else{
    clearTimeout(fadecounter);
    document.getElementById("fscroller").style.color="rgb("+endcolor[0]+", "+endcolor[1]+", "+endcolor[2]+")";
    setTimeout("changecontent()", delay);	
  }   
}

/*Rafael Raposo's new function*/
function getstepcolor(step) {
  var diff
  var newcolor=new Array(3);
  for(var i=0;i<3;i++) {
    diff = (startcolor[i]-endcolor[i]);
    if(diff > 0) {
      newcolor[i] = startcolor[i]-(Math.round((diff/maxsteps))*step);
    } else {
      newcolor[i] = startcolor[i]+(Math.round((Math.abs(diff)/maxsteps))*step);
    }
  }
  return ("rgb(" + newcolor[0] + ", " + newcolor[1] + ", " + newcolor[2] + ")");
}

if (ie4||DOM2)
  document.write('<div id="fscroller" style="border:0px solid black;width:'+fwidth+';height:'+fheight+'"></div>');

if (window.addEventListener)
window.addEventListener("load", changecontent, false)
else if (window.attachEvent)
window.attachEvent("onload", changecontent)
else if (document.getElementById)
window.onload=changecontent