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JavaScript - Image Change Fails
I have a function called onload that includes this:
Code: window.onload=new function(){
...
if (menuletter!=false){
document.cookie="hddrv="+(menuletter)+"; path=/; expires="+exp.toGMTString();
document.enterIndex.src='enter2.gif';
// window.setTimeout("goIndex()",7000);
// return false;
}
...
}
<img border="0" name="enterIndex" src="enter1.gif" width="413" height="41">
If I uncomment the two lines and comment the document image swap line, they execute perfectly, so the routine works. But if I try to do the image swap instead of the two commented lines, it doesn't swap. Of course, the image enter1.gif and enter2.gif exist. What am I doing wrong? Similar TutorialsHello I am pretty new to AJAX & I am making a simple program to input new text refresh inside the HTML element that has the id='result'. My Problem: - The AJAX script fails when I try to change the text inside 'result' using my code, sometimes a whole new page opens with the text I wanted to put inside the result HTML element. Sometimes I just get a notification that an error occured. - I believe it is because of my function state_changed & using the parameter element_id with the function getElementById(element_id).innerHTML = ...; - It should be easy to see where my problem occurs when you look at my code Any advice on why the script fails & how to fix it would be extremely helpful. Code:
var xmlHttp;
function ajax_compatible()
{
// Post: Returns an object if browser is AJAX compatible else false.
if (window.XMLHttpRequest)
{
// users web browser can support AJAX
return ( new XMLHttpRequest() );
}
else if (window.ActiveXObject)
{
// users web browser is IE6 and IE5
return ( new ActiveXObject("Microsoft.XMLHTTP") );
}
else {
alert("Unfortunately your browser does not support AJAX.");
return null;
}
}
function get_cookie(cookie_name)
{
if (document.cookie.length > 0)
{
c_start = document.cookie.indexOf(cookie_name + "=");
if (c_start != -1)
{
c_start = c_start + cookie_name.length+1;
c_end = document.cookie.indexOf(";",c_start)
if (c_end == -1)
{
c_end = document.cookie.length;
}
return unescape(document.cookie.substring(c_start,c_end))
}
}
return ""
}
function add_comment()
{
// Post: Add user comment & rating to database and update new table row.
// DO WE NEED TO SEND COOKIE ASWELL OR IS IT ALREADY DONE???
xmlHttp = ajax_compatible();
if (xmlHttp == null) {
return;
}
var url = 'http://localhost:8000/cgi-bin/main.py';
alert("add_comment() running");
// Extract CGI variables to pass onto python script
var id = document.getElementById('videoID').value;
var video_id = 'videoID=' + id;
var rating = 'rating=' + document.getElementsByName('rating').value;
var comment = 'comment=' + document.getElementById('comment').value;
var add_rating = 'addRating=' + document.getElementById('addRating').value;
//var cookie = document.cookie;
cgi_var = video_id + '&' + rating + '&' + comment + '&' + add_rating; // + '&' + cookie;
// open python script
xmlHttp.open('POST',url,true);
xmlHttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
// Error is in below line
xmlHttp.onreadystatechange = state_changed(id);
// if I use the following line then it works
// xmlHttp.onreadystatechange = test;
xmlHttp.send(cgi_var);
}
function state_changed(element_id)
{
// Post: Use one function that will be used for each page update.
// This function sends the text returned by the python server script
// onto the browser(HTML element with the id 'element_id') to be displayed.
if (xmlHttp.readyState == 4)
{
document.getElementById(element_id).innerHTML = xmlHttp.responseText;
}
}
function test()
{
// Post: used to test where the problem occurs
// This function works
if (xmlHttp.readyState == 4)
{
document.getElementById('result').innerHTML = xmlHttp.responseText;
}
}
Greetings. I am using an image galery script written by another person - frogjs (http://www.puidokas.com/portfolio/frogjs/) This script is showing current pic in the middle of the screen and next/previous little tumbnails on right/left sides of the current. When you click the next pic, current pic is zoomed out to the left and next pic is zoomed in to the middle, then replaced by a full-size pic. Then a new tumbnail appears on the place of the next pic you clicked. Zooming and stuff is done with another thirdparty script "effects" (script.aculo.us effects.js v1.7.0) My problem is, the actual next tumbnail is not being shown until the big image is preloaded for this thumbnail. This is done to make it look smooth. So, when i click "next" picture, the next picture is shown, but switching to the following one is delayed until that following one is actually loaded. It is done by making an imgpreloader=Image() object and setting imgpreloader.onload to a function, then setting imgpreloader.src to the big image path. The big image then is supposed to be automatically loaded by browser. When its done, an onload event should fire and that should execute the function that shows the thumbnail for the big picure. Problem is, sometimes the onload event won't happen! And since it wont happen, my gallery will "stall" - it will never show next thumbnail and never allow to continue viewing. And if i show next thumbnail immediately, the next picture would be shown partially and that does not look good. Moreover, i've seen numerous image galeries on numerous sites and all of them seem to work with onload because i only see the image when its loaded, until that i see some "wait" or "grey screen" thing. Never had a problem with those stalling. Problem happens mostly with Opera and Chrome and happens seldom with IE. So, question is, do you probably know what can prevent browsers from firing and OnLoad event or from loading a picture when its suppied as an src for an Image() object? Do you know a workaround that can "poke" the browser to remind it to get the damn picture again and not to stall. http://www.***.com/5.html i cant get a caption specific to each image to display under the arrows when the image changes. it is especially hard for me because i have to edit the javascript which confuses the **** out of me. it seemed so simple.... thanks for any help ps i cant start an id with a digit? it doesnt seem to cause any problems...why is it stated that this cannot or shouldnot be done? I am quite new to JavaScript code and have a challenge. I would like to add a mouseover script to several different images e.g. Manufacturer logos which would cause a background image to change accordingly. There are eight different logos which would refer to eight background images respectively. I have found several scripts which cause the image which has the mouseover to change but not any which cause a different image to change. Is this practical using JavaScript? Any help is greatly appreciated!
Hi everyone. Can anyone help me , i need to make a onmouseover function , when u go with mouse on the left small image it automatically opens the large image in the right, can anyone help me with this ??? Here is my code for two tab images. Code: <a href="#page-2"><img src="/images/but02.png" style="margin-top:8px; float:left;"></a>
<a href="#page-1"><img src="/images/but01.png" style="margin-top:8px; float:left;"></a>
I need to have it so when tab '#page-2' is clicked it will change the image to '/images/but03.png' and when tab '#page-1' is clicked it will change the image to '/images/but04.png' ? Its basically to show which tab is active, one image is lighter then the other. Can anyone help ? Hi! Sorry for asking such noobish questions, I tried to search but couldnt find anything addressing my problem. It's probably pretty simple though. I have an image on a website. I want the image to change, after the user has clicked on it five times. In other words, on the first 4 clicks, nothing should happen. But the fifth click should change the source of the image. Here is my feeble attempt: Code: function image_changer(){
var i=0;
for (i=0;i<=5;i++)
{
document.getElementById('changingimage001').src = 'images/smile6.jpg';
}
}
HTML: Code: <img id="changingimage001" src="images/base.jpg" onclick="image_changer();" alt="a changing image" />' I quess my main confusion is this: How do I make a new iteration in my for loop happen only when the mouse is clicked (instead of all the iterations running trough as fast as possible)? i am trying to use the most simple code i can to onmouseover of some text change 1 image. it will have multiple texts with different images for each one all displayed in one place. it seems to work well for me in IE, but on firefox the mouseover doesn't work. and on a mac it doesn't work in safari or firefox. any input is appreciated... here is the shortest version of the code i could put together. Code: <head>
<SCRIPT LANGUAGE="JAVASCRIPT">
<!--
function roll(img_name1, img_src1)
{
document[img_name1].src = img_src1;
}
//-->
</SCRIPT>
</head>
<body>
<a href="2_17_10/index.html" onmouseover="roll('poster','2_17_10/IMG_7075b.jpg')">2-17-10</a>
<img src="2_16_10/IMG_7072.jpg" name="poster" width=500></img>
</body>
</html>
Hi there, I have found some script to auto change an image on my website, but i would like to do this in 2 other places using completely new pictures. for ease i have set up 3 cells in a table and would like them to appear in each cell. Can any body help altering my code to allow this. The code i have so far is Code: <html lang="en">
<head>
<script type="text/javascript">
var c=0
var s
function photoGallery()
{
if (c%4==0){
document.getElementById('photo-gallery').src = "boots.jpg";
}
if (c%4==1){
document.getElementById('photo-gallery').src = "adidas.jpg";
}
if (c%4==2){
document.getElementById('photo-gallery').src = "play.jpg";
}
if (c%4==3){
document.getElementById('photo-gallery').src = "argos.jpg";
}
c=c+1
s=setTimeout("photoGallery()",1000)
}
</script>
</head>
<body onLoad="photoGallery()">
<table border="1">
<tr>
<td><img src="amazon.jpg" id="photo-gallery" width="420" height="260"></td>
<td>another image loop here</td>
<td>and another image loop here</td>
</tr>
</table>
</body>
</html>
Thank you in advance I Need some help with mouse overs. I have 2 images, Image A and Image B. I need to mouse over Image A and have Image B change. Please help.
Can anyone link me to code that will change an image everyweek to an image that I define? I have 52 different images, one for every week.
Hey everyone, I'm making a bit of a weird site on a server with no php, mysql etc. To save me work, I've included the header and footer using AJAX but would like to change the relevant nav bar image to the rollover image if the visitor is on that page. My javascript skills are TERRIBLE, but I came up with this anyway and was going to put it inbetween the <a> tags where the image currently sits. Probably for a very obvious reason unknown to me, the page just loads indefinitely making nothing work. Here's what I've got: Code: if (window.location='index.html') {
document.write('<img src="images/key/home-r.jpg" name="home" onMouseOver="over(5)" onMouseOut="out(5)">')
}
else {document.write('<img src="images/key/home.jpg" name="home" onMouseOver="over(5)" onMouseOut="out(5)">')}
Thanks so much for any help at all. I need a JavaScript image changer like this: When you mouse over photo1.jpg, it will change to photo2.jpg. When you mouse over photo2.jpg it will change to photo 3.jpg and so on untill photo5.jpg. Please keep this in JavaScript form :) Code: function greet()
{
var hour = (new Date()).getHours();
var when = (hour > 17) ? "evening" : ( (hour > 11) ? "afternoon" : "morning" );
document.write('<img src="' + when + '.png" alt="Good ' + when + '">\n');}
This script puts up a png which gives a greeting depending on the time of day. I want instead to put the greeting as text. It's a bit ostentacious as it is.. I would appreciate any pointers. Site is here. Thank you. Say I have a website, that I want to use an iframe with. Would be possible, to use Javascript to change the logo image of an iframe of myspace (just for the example), to one on my site? So switch the logo of myspace with one on my server? Is this possible? Blockis Hello, my name is Paula an I am making a website where I have an image changing on my homepage each time it is reloaded. I found a code that lets me do this. This is the script: <HEAD> <SCRIPT LANGUAGE="JavaScript"> <!-- Begin // Set up the image files to be used. var theImages = new Array() // do not change this // To add more image files, continue with the // pattern below, adding to the array. theImages[0] = '1.gif' theImages[1] = '2.gif' theImages[2] = '3.gif' theImages[3] = '4.gif' var j = 0 var p = theImages.length; var preBuffer = new Array() for (i = 0; i < p; i++){ preBuffer[i] = new Image() preBuffer[i].src = theImages[i] } var whichImage = Math.round(Math.random()*(p-1)); function showImage(){ document.write('<img src="'+theImages[whichImage]+'">'); } </script> </HEAD> <BODY> <SCRIPT LANGUAGE="JavaScript"> <!-- Begin showImage(); // End --> </script> It worked fine, with four images. The thing is I wanted to put up to 16 in it. So I tried ad up to 16 numbers with images but as soon as I put more than four, it would not work. Finally what I did was to copy four times the same numbers and then it worked (0-3 , four times)... so then I had many images shown randomly but the problem now is that the random is very uneven among the images. Meaning, I get variation among very few, and many time repeating one. This is what my script looks like now: <SCRIPT LANGUAGE="JavaScript"> <!-- Begin // Set up the image files to be used. var theImages = new Array() // do not change this // To add more image files, continue with the // pattern below, adding to the array. theImages[0]='http://elenacliment.tomosfactory.fr/userfiles/image/ImagesElena/ElenaPaintingsHome2/Alacenaconcajadegalletes-pgWShadow3.jpg' theImages[1]='http://elenacliment.tomosfactory.fr/userfiles/image/ImagesElena/ElenaPaintingsHome2/AltarinGasStation-pgSH.jpg' theImages[2]='http://elenacliment.tomosfactory.fr/userfiles/image/ImagesElena/ElenaPaintingsHome2/AltaroftheDeadwithEmbroideredTablecloth-pgSH.jpg' theImages[3]='http://elenacliment.tomosfactory.fr/userfiles/image/ImagesElena/ElenaPaintingsHome2/Altarsobreparedverde-pgSH.jpg' theImages[0]='http://elenacliment.tomosfactory.fr/userfiles/image/ImagesElena/ElenaPaintingsHome2/BricksandClotheslineSH-pg.jpg' theImages[1]='http://elenacliment.tomosfactory.fr/userfiles/image/ImagesElena/ElenaPaintingsHome2/Cocinaamarilla-pgSH.jpg' theImages[2]='http://elenacliment.tomosfactory.fr/userfiles/image/ImagesElena/ElenaPaintingsHome2/LatadeTecateconenchufes-pgSH.jpg' theImages[3]='http://elenacliment.tomosfactory.fr/userfiles/image/ImagesElena/ElenaPaintingsHome2/LedgewithTecates-wcSH.jpg' theImages[0]='http://elenacliment.tomosfactory.fr/userfiles/image/ImagesElena/ElenaPaintingsHome2/Mesaamarilla-pgSH-pg.jpg' theImages[1]='http://elenacliment.tomosfactory.fr/userfiles/image/ImagesElena/ElenaPaintingsHome2/MosaicwithPhotographofVictorianInterior-pgSH.jpg' theImages[2]='http://elenacliment.tomosfactory.fr/userfiles/image/ImagesElena/ElenaPaintingsHome2/Paredrojaconjualas-pg.jpg' theImages[3]='http://elenacliment.tomosfactory.fr/userfiles/image/ImagesElena/ElenaPaintingsHome2/red_cupboardSH.jpg' theImages[0]='http://elenacliment.tomosfactory.fr/userfiles/image/ImagesElena/ElenaPaintingsHome2/RoomwithLandscapeofBurgundy-pgSH.jpg' theImages[1]='http://elenacliment.tomosfactory.fr/userfiles/image/ImagesElena/ElenaPaintingsHome2/Cocinaamarilla-pgSH.jpg' theImages[2]='http://elenacliment.tomosfactory.fr/userfiles/image/ImagesElena/ElenaPaintingsHome2/YellowandRedPorch-wcSH.jpg' theImages[3]='http://elenacliment.tomosfactory.fr/userfiles/image/ImagesElena/ElenaPaintingsHome2/LedgewithTecates-wcSH.jpg' var j = 0 var p = theImages.length; var preBuffer = new Array() for (i = 0; i < p; i++){ preBuffer[i] = new Image() preBuffer[i].src = theImages[i] } var whichImage = Math.round(Math.random()*(p-1)); function showImage(){ document.write('<img src="'+theImages[whichImage]+'">'); } // End --> </script> So my question is: How can I manage with this script to have all my images showing up equally when they change in refresh? I don not mind if they are not random, I also tried to remove the random property but could not manage either. Any ideas? Thank you so much, I really appreciate your help. Paula Could anyone show me a script that would allow the user whos on my site change the background image from the default color to an image from a URL? And then it would have to save their choice in a cookie. Thanks!
Hello, I have 3 smaller thumbnail images and when I click on any of them, the resulting image displays in the larger image space. The tricky part is that I want the larger image to become a link that changes, depending on which image is displaying. (I don't want the little images to be links.) Click here for a visual to help explain what I am wanting to do. Here is what I have for script...but I can't figure out the links... Code: <script>
function changeImage(filename)
{
document.main.src = filename;
}
</script>
<table><tr><td><img name="main" src="images/4.gif"></td>
<td>
<a href="#" onClick="javascript:changeImage('images/1.gif')"><img src="images/11.gif"></a><br>
<a href="#" onClick="javascript:changeImage('images/2.gif')"><img src="images/22.gif"></a><br>
<a href="#" onClick="javascript:changeImage('images/3.gif')"><img src="images/33.gif"></a><br>
</td></tr></table>
This script works fine, but I can't figure out how to make the larger image have 3 separate links, depending on which image is displaying in it. Thanks for any help you can be! I am wondering if it would be possible to add a Cookie to this code i found, i am wanting the browser to remember the chosen background image and save it when the user closes the browser. Currently when the option is selected it does not remember the choice when you then go back to the page, any help on this would be much appreciated! Many Thanks Code: <script type="text/javascript">
function changeTheme()
{
var e = document.getElementById("themes");
var theme = e.options[e.selectedIndex].value;
console.log(theme);
document.getElementById("shelf").style.backgroundImage = "url("+theme+")";
}
</script>
<body id="shelf"> <select id="themes" onChange="changeTheme()"> <option value="images/background1.jpg">Default</option> <option value="images/background2.jpg">Oriental</option> </select> |
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