var supersleight=false;//per tutti i browser che visualizzano di default le png

function MM_preloadImages() { //v3.0
  	var d=document; 
 	if(d.images){ //controlla che il browser supporti
		if(!d.MM_p) {
			d.MM_p=new Array();
		}
		var i;
		var j=d.MM_p.length;
		var 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];
			}
		}
	}
}

/*ROLLOVER IMG*/
function rollOver(obj, img) {//questa funzione mi serve per passare i parametri senza attivare la funzione
	return function() { 
		if(obj.hasClassName('img_rollover')){
			obj.src=img;
			if(supersleight && img.match(/\.png$/i) !== null){
				supersleight.aggiorna(obj);
			}
		}
	}
}

function attiva_rollover(obj){
	//l'immagine può essere png o no
	//se l'immagine è png è già stata sostituita con shim, quindi percorso, nome, estensione sono diversi
	filtro=obj.style.filter;
	if(supersleight && filtro){//controllo se esiste filter
		//ricavo da qui il nome originale della png
		inizio="progid:DXImageTransform.Microsoft.AlphaImageLoader(src='";
		src=filtro.substr(inizio.length);
		src=src.substr(0, src.indexOf("'"));
	}else{
		src=obj.getAttribute('src'); //no png o png non su IE
	}
	nome_img=src.replace(/(.+)\.(\w+)\??[0-9]*$/, "$1");
	estensione_img=src.replace(/.*\/?[a-zA-Z0-9_-]+\.(\w+)\??[0-9]*$/, "$1");
	img_on=nome_img+"_on."+estensione_img;
	img_off=nome_img+"."+estensione_img;

	//preload, il percorso è relativo alla pagina html
	MM_preloadImages(img_on);
	
	//over e ricarico supersleight
	Event.observe(obj, 'mouseover', rollOver(obj, img_on));
	
	//out e ricarico supersleight
	Event.observe(obj, 'mouseout', rollOver(obj, img_off));
}

//le immagini di rollover devono avere class img_rollover e lo stesso nome ma con l'aggiunta di _on
function cerca_rollover(){
	if($$('.img_rollover')){
		$$('.img_rollover').each(function(obj){
			attiva_rollover(obj);
		});
	}
}

function cerca_rollover_on_specific_object(id){
    if($$('#'+id+' .img_rollover ')){
        classi = $$('#'+id+' .img_rollover');
        $$('#'+id+' .img_rollover').each(function(obj){
            attiva_rollover(obj);
        });
    } 
}

/*---------------------*/


/*---------------------*/
/*---------------------*/
/*SOUND*/
/*---------------------*/
/*---------------------*/
MPSound = {
    play : function(sound_url, tk, rep){
		if(tk){
			if(!rep){rep=false;}
        	Sound.play(sound_url, {track: tk, replace: rep});
		}else{
        	Sound.play(sound_url);
		}
    },
    enable : function(sound_url){
        Sound.enable(sound_url);
    },
    disable : function(sound_url){
        Sound.disable(sound_url);
    },
    stop : function(tk){
        Sound.enable();
		if(tk){
	        Sound.play('', {track: tk, replace:true});
		}else{
        	Sound.play('', {replace:true});
		}
    }
};

function preloadSound(url){
	if((Prototype.Browser.Gecko || navigator.userAgent.indexOf("Chrome") > 0 || navigator.userAgent.indexOf("Safari") > 0) && navigator.userAgent.indexOf("Win") > 0){
	  if(navigator.plugins && $A(navigator.plugins).detect(function(p){ return p.name.indexOf('QuickTime') != -1 })){
	    document.write('<object width="0" height="0" type="audio/mpeg" data="'+url+'"><param name="autostart" value="false"></object>');
	  }else if(navigator.plugins && $A(navigator.plugins).detect(function(p){ return p.name.indexOf('Windows Media') != -1 })){
	    document.write('<object type="application/x-mplayer2" data="'+url+'"><param name="autostart" value="false"></object>');
	  }else if(navigator.plugins && $A(navigator.plugins).detect(function(p){ return p.name.indexOf('RealPlayer') != -1 })){
	    document.write('<embed type="audio/x-pn-realaudio-plugin" style="height:0" src="'+url+'" loop="false" autostart="false" hidden="true"/>');
	  }else{
	    document.write('<embed style="height:0" src="'+url+'" loop="false" autostart="false" hidden="true"/>');
	  }
	}else if(navigator.userAgent.indexOf("Firefox/3") > 0 && navigator.userAgent.indexOf("Mac") > 0){
		document.write('<object width="0" height="0" type="audio/mpeg" data="'+url+'"><param name="autostart" value="false"></object>');
	}else{
	    document.write('<embed style="height:0"  src="'+url+'" loop="false" autostart="false" hidden="true"/>');
	}
}

/*---------------------*/
/*----------------------------------------------------------------------------*/
// browser detection
// script from http://www.quirksmode.org/js/detect.html
// NOTE: where possible use OBJECT detection instead of BROWSER detection
/*----------------------------------------------------------------------------*/
var BrowserDetect = {
	init: function () {
		this.browser = this.searchString(this.dataBrowser) || "An unknown browser";
		this.version = this.searchVersion(navigator.userAgent)
			|| this.searchVersion(navigator.appVersion)
			|| "an unknown version";
		this.OS = this.searchString(this.dataOS) || "an unknown OS";
	},
	searchString: function (data) {
		for (var i=0;i<data.length;i++)	{
			var dataString = data[i].string;
			var dataProp = data[i].prop;
			this.versionSearchString = data[i].versionSearch || data[i].identity;
			if (dataString) {
				if (dataString.indexOf(data[i].subString) != -1)
					return data[i].identity;
			}
			else if (dataProp)
				return data[i].identity;
		}
	},
	searchVersion: function (dataString) {
		var index = dataString.indexOf(this.versionSearchString);
		if (index == -1) return;
		return parseFloat(dataString.substring(index+this.versionSearchString.length+1));
	},
	dataBrowser: [
		{ 	string: navigator.userAgent,
			subString: "OmniWeb",
			versionSearch: "OmniWeb/",
			identity: "OmniWeb"
		},
		{
			string: navigator.vendor,
			subString: "Apple",
            versionSearch: "Version",
			identity: "Safari"
		},
		{
			prop: window.opera,
			identity: "Opera"
		},
		{
			string: navigator.vendor,
			subString: "iCab",
			identity: "iCab"
		},
		{
			string: navigator.vendor,
			subString: "KDE",
			identity: "Konqueror"
		},
		{
			string: navigator.userAgent,
			subString: "Firefox",
			identity: "Firefox"
		},
		{
			string: navigator.vendor,
			subString: "Camino",
			identity: "Camino"
		},
		{		// for newer Netscapes (6+)
			string: navigator.userAgent,
			subString: "Netscape",
			identity: "Netscape"
		},
		{
			string: navigator.userAgent,
			subString: "MSIE",
			identity: "Explorer",
			versionSearch: "MSIE"
		},
		{
			string: navigator.userAgent,
			subString: "Gecko",
			identity: "Mozilla",
			versionSearch: "rv"
		},
		{ 		// for older Netscapes (4-)
			string: navigator.userAgent,
			subString: "Mozilla",
			identity: "Netscape",
			versionSearch: "Mozilla"
		}
	],
	dataOS : [
		{
			string: navigator.platform,
			subString: "Win",
			identity: "Windows"
		},
		{
			string: navigator.platform,
			subString: "Mac",
			identity: "Mac"
		},
		{
			string: navigator.platform,
			subString: "MacPPC",
			identity: "Mac"
		},                 
		{
			string: navigator.platform,
			subString: "MacIntel",
			identity: "Mac"
		},
        {
			string: navigator.platform,
			subString: "Linux",
			identity: "Linux"
		},
        {
			string: navigator.platform,
			subString: "iPod",
			identity: "iPod"
		},
        {
			string: navigator.platform,
			subString: "iPhone",
			identity: "iPhone"
		}
	]
};
BrowserDetect.init();
/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/
// verifica quali problemi ci sono col browser/os, flash, cookie
/*----------------------------------------------------------------------------*/
function detectBrowser()
{
    //browser
    /*var errore_browser=true;
    if(BrowserDetect.browser=='Safari' && BrowserDetect.version>=3){
        errore_browser=false;
    }
    if(BrowserDetect.browser=='Firefox' && BrowserDetect.version>=2){
        errore_browser=false;
    }
    if(BrowserDetect.browser=='Explorer' && BrowserDetect.version>=7){
        errore_browser=false;
    }
    if(BrowserDetect.browser=='Mozilla' && BrowserDetect.version>=5){
        errore_browser=false;
    }*/
    var errore_browser=false;
    if(BrowserDetect.browser=='Explorer' && BrowserDetect.version<7){
        errore_browser=true;
    }
    //flash
    //var errore_flash=true;
    //var hasReqestedVersion = DetectFlashVer(requiredMajorVersion, requiredMinorVersion, requiredRevision);
    //if(hasReqestedVersion){
        errore_flash=false;
    //}
    //cookie
    //var errore_cookie=true;
    //var cookieEnabled=(navigator.cookieEnabled)? true : false
    //if (cookieEnabled) {
        errore_cookie=false;
    //}
    
	array_errori=Array();
	array_errori['errore_browser']=errore_browser;
	array_errori['errore_flash']=errore_flash;
	array_errori['errore_cookie']=errore_cookie;
	return array_errori;
}
/*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/
// verifica se ci sono dei problemi col browser/os, flash, cookie
/*----------------------------------------------------------------------------*/
function validateBrowser()
{
    array_errori=detectBrowser();
	if(array_errori['errore_browser']){
		return false;
	}
	if(array_errori['errore_flash']){
		return false;
	}
	if(array_errori['errore_cookie']){
		return false;
	}
	return true;
}
/*----------------------------------------------------------------------------*/