Solved

adding a fade effect to javascript image slideshow

Posted on 2009-05-10
3
1,248 Views
Last Modified: 2012-06-27
Hey folks,

I have a script another member was gracious enough to help me build that's essentially a glorified timed image slideshow. Everything works well, and it does what I want it to, but now that I've extended it a bit to add some additional images, urls and so forth I'd like to add a fadeout/fade in effect between slides. What's the best way to go about this?

A bit new to javascript; primarily a php/mysql guy; I do have jquery available as well.

Thanks!
///////////////////////////////////////////JAVASCRIPT///////////////////////////////////////
<script language="javascript">
 
<!--
numSeconds = 3000;
numCurrentImg = 0;
numPhotos = 3;
timer = null;
var imgPhoto1 = new Image();
imgPhoto1.src = "images/1.jpg";
var imgPhoto2 = new Image();
imgPhoto2.src = "images/2.jpg";
var imgPhoto3 = new Image();
imgPhoto3.src = "images/3.jpg";
 
var link1 = "images/1.html";
var link2 = "images/2.html";
var link3 = "images/3.html";
 
var urls = new Array(
        "images/1.htm",
        "images/2.htm",
        "images/3.htm"
);
 
 
 
function swapImg( numNewImg ) {
	
	var url = document.getElementById("imagelink");
	eval("document.imgMain.src = imgPhoto" + numNewImg + ".src");
	url.setAttribute("href", urls[numNewImg-1]);
	if (document.getElementById('imgLabel'))
		document.getElementById('imgLabel').innerHTML = numNewImg;
	numCurrentImg = numNewImg;
	
}
 
function startShow() {
	if (timer == null)
	    swapTimeout();
}
 
function stopShow() {
	if (timer != null){
		window.clearTimeout(timer);
		timer = null;				
	}
}
function toggleShow() {
	if (timer == null) {
	    startShow();
	} else {
		stopShow();				
	}
}
 
function nextImg() {
	stopShow();
	$("rotateImage").fadeOut("slow");
	var url = document.getElementById("imagelink");
	numNewImg = numCurrentImg+1;	   
	if (numNewImg > numPhotos)
		numNewImg = 1
	eval("document.imgMain.src = imgPhoto" + numNewImg + ".src");
 
	url.setAttribute("href", urls[numNewImg-1]);
	if (document.getElementById('imgLabel'))
		document.getElementById('imgLabel').innerHTML = numNewImg;
	numCurrentImg = numNewImg;
}
 
function prevImg() {
	
	stopShow();
	var url = document.getElementById("imagelink");
	numNewImg = numCurrentImg-1;
	if (numNewImg < 1)
		numNewImg = numPhotos
	eval("document.imgMain.src = imgPhoto" + numNewImg + ".src");
	
 
	var url = document.getElementById("imagelink");
	url.setAttribute("href", urls[numNewImg-1]);
	if (document.getElementById('imgLabel'))
		document.getElementById('imgLabel').innerHTML = numNewImg;
	numCurrentImg = numNewImg;
}
 
function swapTimeout() {
 
	if ( numCurrentImg == numPhotos ) { // We've just displayed the last img.
		numCurrentImg = 1;
	} else {
		numCurrentImg++;
	}
 
	swapImg(numCurrentImg);
	timer = window.setTimeout(swapTimeout, numSeconds);
}
//-->
 
function swapImage2(imageid) {
 
switch (imageid) {
 case 1:
   stopShow();
   rotateImage.src = imgPhoto1.src;
   imagelink.href=urls[0];
   return(false);
case 2:
   stopShow();
   rotateImage.src = imgPhoto2.src;
   imagelink.href=urls[1];
   return(false);
case 3:
   stopShow();
   rotateImage.src = imgPhoto3.src;
   imagelink.href=urls[2];
   return(false);
 
 }
}
 
 
 
window.onload = startShow;
 
</script>
////////////////////////////////////////////////////////////CSS///////////////////////////////
<style>
 
.float_text {
        font-family:"Lucida Grande", "Lucida Sans Unicode", "Trebuchet MS", Arial, sans-serif;
        font-size:16px;
        background-color:red;
        z-index:55;
        position:absolute;
        top:-1px;
        left:5px;
}
.float_text h1 {
        
        font-size:22px;
        letter-spacing:-1px;
        margin:5px; padding:5px;
        top: 5px;
}
 
.float_box {
        width:300px;
        height:30px;
        position:absolute;
        top:420px;
        
        background-color:white;
        /*top:550px;
        left:15;*/
        z-index:35;
 
}
 
 
#rotateDiv { position:absolute; top:0; left:0; z-index:15; }
 </style>
 
/////////////////////////////////////////////////////////HTML//////////////////////////////////
<body>
 
 
 
 
                        <div class="float_box" id="floatbox">
                              
                                <!--<div class="float_text" id="navbox" onclick="" > -->
                                
                                <span onclick="swapImage2(1);" id="swap1">swap1</span>
                                <span onclick="swapImage2(2);" id="swap2">swap2</span>
                                <span onclick="swapImage2(3);" id="swap3">swap3</span>
                                <span onclick="prevImg();" id="Previous">Previous</span>
                                <span onclick="nextImg();" id="Next">Next</span>
                                
                               
                        </div>
                           
                           
                                <div id="rotateDiv">
                                <a href="1.htm" name="imagelink" id="imagelink"><img src="images/1.jpg" id="rotateImage" name="imgMain" border="0" title="" alt=""></a>
                        </div>
                
 
</body>
 
---------------------------------------------------------------------
and to make it easy for you, everything in one file:
----------------------------------------------------------------------
 
<html xmlns="http://www.w3.org/1999/xhtml">
 
<head>
<meta content="text/html; charset=utf-8" http-equiv="Content-Type" />
<title>Swap Image</title>
	<script type="text/javascript" src="jquery.js"></script>
 
 
 
<script language="javascript">
 
<!--
numSeconds = 3000;
numCurrentImg = 0;
numPhotos = 3;
timer = null;
var imgPhoto1 = new Image();
imgPhoto1.src = "images/1.jpg";
var imgPhoto2 = new Image();
imgPhoto2.src = "images/2.jpg";
var imgPhoto3 = new Image();
imgPhoto3.src = "images/3.jpg";
 
var link1 = "images/1.html";
var link2 = "images/2.html";
var link3 = "images/3.html";
 
var urls = new Array(
        "images/1.htm",
        "images/2.htm",
        "images/3.htm"
);
 
 
 
function swapImg( numNewImg ) {
	
	var url = document.getElementById("imagelink");
	eval("document.imgMain.src = imgPhoto" + numNewImg + ".src");
	url.setAttribute("href", urls[numNewImg-1]);
	if (document.getElementById('imgLabel'))
		document.getElementById('imgLabel').innerHTML = numNewImg;
	numCurrentImg = numNewImg;
	
}
 
function startShow() {
	if (timer == null)
	    swapTimeout();
}
 
function stopShow() {
	if (timer != null){
		window.clearTimeout(timer);
		timer = null;				
	}
}
function toggleShow() {
	if (timer == null) {
	    startShow();
	} else {
		stopShow();				
	}
}
 
function nextImg() {
	stopShow();
	$("rotateImage").fadeOut("slow");
	var url = document.getElementById("imagelink");
	numNewImg = numCurrentImg+1;	   
	if (numNewImg > numPhotos)
		numNewImg = 1
	eval("document.imgMain.src = imgPhoto" + numNewImg + ".src");
 
	url.setAttribute("href", urls[numNewImg-1]);
	if (document.getElementById('imgLabel'))
		document.getElementById('imgLabel').innerHTML = numNewImg;
	numCurrentImg = numNewImg;
}
 
function prevImg() {
	
	stopShow();
	var url = document.getElementById("imagelink");
	numNewImg = numCurrentImg-1;
	if (numNewImg < 1)
		numNewImg = numPhotos
	eval("document.imgMain.src = imgPhoto" + numNewImg + ".src");
	
 
	var url = document.getElementById("imagelink");
	url.setAttribute("href", urls[numNewImg-1]);
	if (document.getElementById('imgLabel'))
		document.getElementById('imgLabel').innerHTML = numNewImg;
	numCurrentImg = numNewImg;
}
 
function swapTimeout() {
 
	if ( numCurrentImg == numPhotos ) { // We've just displayed the last img.
		numCurrentImg = 1;
	} else {
		numCurrentImg++;
	}
 
	swapImg(numCurrentImg);
	timer = window.setTimeout(swapTimeout, numSeconds);
}
//-->
 
function swapImage2(imageid) {
 
switch (imageid) {
 case 1:
   stopShow();
   rotateImage.src = imgPhoto1.src;
   imagelink.href=urls[0];
   return(false);
case 2:
   stopShow();
   rotateImage.src = imgPhoto2.src;
   imagelink.href=urls[1];
   return(false);
case 3:
   stopShow();
   rotateImage.src = imgPhoto3.src;
   imagelink.href=urls[2];
   return(false);
 
 }
}
 
 
 
window.onload = startShow;
 
</script>
 
 
</head>
 
<style>
 
.float_text {
        font-family:"Lucida Grande", "Lucida Sans Unicode", "Trebuchet MS", Arial, sans-serif;
        font-size:16px;
        background-color:red;
        z-index:55;
        position:absolute;
        top:-1px;
        left:5px;
}
.float_text h1 {
        
        font-size:22px;
        letter-spacing:-1px;
        margin:5px; padding:5px;
        top: 5px;
}
 
.float_box {
        width:300px;
        height:30px;
        position:absolute;
        top:420px;
        
        background-color:white;
        /*top:550px;
        left:15;*/
        z-index:35;
 
}
 
 
#rotateDiv { position:absolute; top:0; left:0; z-index:15; }
 </style>
 
<body>
 
 
 
 
                        <div class="float_box" id="floatbox">
                              
                                <!--<div class="float_text" id="navbox" onclick="" > -->
                                
                                <span onclick="swapImage2(1);" id="swap1">swap1</span>
                                <span onclick="swapImage2(2);" id="swap2">swap2</span>
                                <span onclick="swapImage2(3);" id="swap3">swap3</span>
                                <span onclick="prevImg();" id="Previous">Previous</span>
                                <span onclick="nextImg();" id="Next">Next</span>
                                
                               
                        </div>
                           
                           
                                <div id="rotateDiv">
                                <a href="1.htm" name="imagelink" id="imagelink"><img src="images/1.jpg" id="rotateImage" name="imgMain" border="0" title="" alt=""></a>
                        </div>
                
 
</body>
 
</html>

Open in new window

0
Comment
Question by:jmoriarty
3 Comments
 
LVL 10

Accepted Solution

by:
mstrelan earned 250 total points
ID: 24351796
easiest is to use a jquery plugin
http://www.serie3.info/s3slider/ is very good
0
 
LVL 8

Assisted Solution

by:Haris V
Haris V earned 250 total points
ID: 24351813
0
 

Author Comment

by:jmoriarty
ID: 24372038
Hey folks,

Thanks, that should be enough information to get me off the ground.

0

Featured Post

The New “Normal” in Modern Enterprise Operations

DevOps for the modern enterprise offers many benefits — increased agility, productivity, and more, but digital transformation isn’t easy, especially if you’re not addressing the right issues. Register for the webinar to dive into the “new normal” for enterprise modern ops.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

PROBLEM: The other day I was working on adding an ajax request to a webpage that already had a dialog box on the page.  The dialog box was using relative positioning to be positioned next to a form field I had on the page.  Everything was working…
Introduction If you're like most people, you have occasionally made a typographical error when you're entering information into an online form.  And to your consternation, the browser remembers the error, and offers to autocomplete your future entr…
The viewer will learn how to dynamically set the form action using jQuery.
The viewer will learn the basics of jQuery, including how to invoke it on a web page. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery.: (CODE)

839 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question