var ieVer6 = (/MSIE 6.0/i.test(navigator.userAgent))? true : false; 
var ieNav = (navigator.appName=="Microsoft Internet Explorer")? true : false; 
var fiNav = (navigator.appName=="Netscape")? true : false; 

//var nImages;
imageOn = new Array();


// Number of images to browser
var	nImages = 7;	
//Random	
var	upImg=Math.ceil(Math.random()*nImages);
var	doImg=(upImg+1>nImages)? 0:upImg+1;

var timeNext=40; // timeNext/10 = second for the next fotogram
var timeAct=0;
var contFader=100;
var time1;
var time2;


function preLoad(){
	
	// preload for images
	for(i=1; i<=nImages; i++) imageOn[i]=false;
	for(i=1; i<=nImages; i++){          
		 eval("imageObj"+i+" = new Image()"); 
		 eval("imageObj"+i+".src='img/banner"+i+".jpg'"); 
		 eval("imageObj"+i+".onLoad=imagesLoaded("+i+")"); 
	 }
	 browsing();
}

function imagesLoaded(n){         
	imageOn[n]=true;
}

function browsing(){         
	clearTimeout(time1);
	
	if (timeAct==timeNext && imageOn[doImg]==true){
		goFader();
		timeAct=0;
	}
	timeAct++;
	time1=setTimeout("browsing()",100);
}

function goFader(){         
	clearTimeout(time2);
	clearTimeout(time1);
	
	if (ieNav) document.getElementById("bannerUp").filters.alpha.opacity=contFader;
	if (fiNav) document.getElementById("bannerUp").style.opacity=contFader/100;

	contFader-=2;
	timeAct++;
	if (contFader>=0) time2=setTimeout("goFader()",40);
	else{ 
		upImg++;
		if (upImg>nImages) upImg=1;
		
		doImg++;
		if (doImg>nImages) doImg=1;
		
		document.getElementById("fotoUp").src=eval("imageObj"+upImg+".src");
		contFader=100;
		if (ieNav) document.getElementById("bannerUp").filters.alpha.opacity=contFader;
		if (fiNav) document.getElementById("bannerUp").style.opacity=contFader/100;

		document.getElementById("fotoDo").src=eval("imageObj"+doImg+".src"); 
		
		//window.status = doImg;
		
		timeAct=0;
		browsing();
	}
}