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)

}













<!--

//window.onload = function() {



var slideShowSpeed = 3000



var crossFadeDuration = 9



var immahome= new Array()



immahome[0]='/public/portale/sites/default/files/home/1.jpg';

immahome[1]='/public/portale/sites/default/files/home/2.jpg';

immahome[2]='/public/portale/sites/default/files/home/3.jpg';

immahome[3]='/public/portale/sites/default/files/home/4.jpg';

immahome[4]='/public/portale/sites/default/files/home/5.jpg';

immahome[5]='/public/portale/sites/default/files/home/6.jpg';

immahome[6]='/public/portale/sites/default/files/home/7.jpg';





var immcucina= new Array()



immcucina[0]='/public/portale/sites/default/files/cucina/1.jpg';

immcucina[1]='/public/portale/sites/default/files/cucina/2.jpg';

immcucina[2]='/public/portale/sites/default/files/cucina/3.jpg';

immcucina[3]='/public/portale/sites/default/files/cucina/4.jpg';

immcucina[4]='/public/portale/sites/default/files/cucina/5.jpg';

immcucina[5]='/public/portale/sites/default/files/cucina/6.jpg';



var immristo= new Array()



immristo[0]='/public/portale/sites/default/files/risto/1.jpg';

immristo[1]='/public/portale/sites/default/files/risto/2.jpg';

immristo[2]='/public/portale/sites/default/files/risto/3.jpg';

immristo[3]='/public/portale/sites/default/files/risto/4.jpg';

immristo[4]='/public/portale/sites/default/files/risto/5.jpg';

immristo[5]='/public/portale/sites/default/files/risto/6.jpg';



var t

var j = 0

var x = 0

var z = 0

var p = immahome.length



var preLoad = new Array()

for (i = 0; i < p; i++){

   preLoad[i] = new Image()

   preLoad[i].src = immahome[i]

}







var t

var j = 0

var pr = immcucina.length



var preLoadCucina = new Array()

for (i = 0; i < pr; i++){

   preLoadCucina[i] = new Image()

   preLoadCucina[i].src = immcucina[i]

}

var preLoadRisto = new Array()
var prz = immristo.length
for (i = 0; i < prz; i++){

   preLoadRisto[i] = new Image()

   preLoadRisto[i].src = immristo[i]

}







function runSlideShow(){



//opacity('imm_home', 0, 100, 1000);

//setTimeout('seep()', 100)



if(document.getElementById('imm_home'))  

 document.getElementById('imm_home').src = preLoad[j].src

if(document.getElementById('imm_cucina')) 

   document.getElementById('imm_cucina').src = preLoadCucina[x].src

if(document.getElementById('imm_risto')) 

   document.getElementById('imm_risto').src = preLoadRisto[z].src






   j = j + 1

   x = x + 1
     z = z + 1
   if (j > (p-1)) j=0

   if (x > (pr-1)) x=0
   
   if (z > (prz-1)) z=0

 t = setTimeout('runSlideShow()', slideShowSpeed)

}





function seep(){}



//}



//-->