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 invisible
	if(document.getElementById(id).style.opacity == 0) {
		opacity(id, 0, 100, millisec);
	} else {
		opacity(id, 100, 0, millisec);
	}
}

function blendimage(divid, imageid, imagefile, lightbox, imagefull, currentnum, millisec) {
	var speed = Math.round(millisec / 100);
	var timer = 1;
	
	//set the current image as background
	
	document.getElementById(divid).style.backgroundColor = "#FFFFFF";
	//document.getElementById(divid).style.backgroundImage = "url(" + document.getElementById(imageid).src + ")";	// PROBLEMI CON FIREFOX
	
	//make image transparent
	changeOpac(0, imageid);
	
	//make new image
	document.getElementById(imageid).src = imagefile;
	//aggiunto x lightbox
	document.getElementById(lightbox).href = imagefull;
	
	//toglie dal flow di lightbox l'immagine corrente
	//altrimenti ie win vede un'immagine in + !
	for(i = 1; i <= 6; i++) {
		var currentimg = "fake"+i;
		document.getElementById(currentimg).rel = 'lightbox[toghether]';
	}

	currentimg = "fake"+currentnum;
	document.getElementById(currentimg).rel = 'whatever';
		
		
	//fade in image
	
	for(i = 0; i <= 100; i++) {
		setTimeout("changeOpac(" + i + ",'" + imageid + "')",(timer * speed));
		timer++;
			
	}
}

function blendimageedilizia(divid, imageid, imagefile, currentnum, millisec) {
	var speed = Math.round(millisec / 100);
	var timer = 1;
	
	//set the current image as background
	document.getElementById(divid).style.backgroundColor = "#FFFFFF";
	
	//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)
}

function pause_computer(millis) {
	// pauses the computer from executing script for given number of milliseconds
var date = new Date();
var curDate = null;

do { curDate = new Date(); } 
while(curDate-date < millis);
}