/* - crossfade.js - */
// http://www.forumeditrice.it/portal_javascripts/crossfade.js?original=1
var galleryId='fotohome';var INTERVAL=5000;var CROSSFADE_TIME=100;var gallery;var galleryImages;var currentImage;var previousImage;preInit();
function preInit(){if((document.getElementById)&&(gallery=document.getElementById(galleryId))){gallery.style.visibility="hidden";clearTimeout(preInitTimer)} else{preInitTimer=setTimeout("preInit()",2)}}
function fader(imageNumber,opacity){var obj=galleryImages[imageNumber];if(obj.style){if(obj.style.MozOpacity!=null){obj.style.MozOpacity=(opacity/100)-.001} else if(obj.style.opacity!=null){obj.style.opacity=(opacity/100)-.001} else if(obj.style.filter!=null){obj.style.filter="alpha(opacity="+opacity+")"}}}
function fadeInit(){if(document.getElementById&&gallery){preInit();galleryImages=new Array;var node=gallery.firstChild;while(node){if(node.nodeType==1){galleryImages.push(node)}
node=node.nextSibling}
for(i=0;i<galleryImages.length;i++){galleryImages[i].style.position='absolute';galleryImages[i].style.display='block';galleryImages[i].style.top=0;galleryImages[i].style.zIndex=0;fader(i,0)}
gallery.style.visibility='visible';currentImage=0;previousImage=galleryImages.length-1;opacity=100;fader(currentImage,100);window.setTimeout("crossfade(100)",1000)}}
function crossfade(opacity){if(opacity<100){fader(currentImage,opacity);fader(previousImage,100-opacity);opacity+=10;window.setTimeout("crossfade("+opacity+")",CROSSFADE_TIME)} else{fader(previousImage,0);previousImage=currentImage;currentImage+=1;if(currentImage>=galleryImages.length){currentImage=0}
galleryImages[previousImage].style.zIndex=0;galleryImages[currentImage].style.zIndex=100;opacity=0;window.setTimeout("crossfade("+opacity+")",INTERVAL)}}
addEvent(window,'load',fadeInit)
function addEvent(elm,evType,fn,useCapture){if(elm.addEventListener){elm.addEventListener(evType,fn,useCapture);return true} else if(elm.attachEvent){var r=elm.attachEvent("on"+evType,fn);return r}}