HTML - How Is This Fading Image Done?

Hi everyone,

How would I go about fading one image into another when the page loads? I know it's something to do with onload, however would know a code or anything for it.

Basically I want it to be exactly like this page with the pencils...
http://www.bh-digital.com/about_us.html

Thank you to anyone who helps

Regards
Ryan

Ok. I know that there are codes for fading between pages, I used to use them ALL THE TIME when I used Piczo (blech!). My question is, do all or at least most browsers support that sort of code, and can I use it in a valid XHTML page? Or is it done with JavaScript?

The only reason I'm asking is because I'm making a new site for my drum videos, and the welcome page has a really nice picture of a drum set (in black and white with a slight glow) with a white background, and if I faded to a blank page, then the homepage, I think it would look really nice.

So again, is it valid XHTML, and do most browsers support it?

Hi all!

I'm currently doing a site, where i all the content is in a roundcornered box, in the middle. There is an black fading outer glow on the box.
Then here is the problem: I want the background to be a striped pattern. But how do i make it striped under the fading?

Thanks in advance!

Hi all --

I'm having an interesting problem. I'm designing a web page that has a navigation banner (home - programs - schedule of events - contact us - downloads) that is made up of a .png for each page (i.e. home.png, programs.png, etc). My page is 1000px wide and all of the navigation banner's images add up to 1000px wide.

I'm using JavaScript to create an onMouseOver and onMouseOut effect on each of the images. The problem that I'm having occurs when I tried to add a link (either by <A HREF= or using an image map). Whenever I add a link to the image, a small (3px) area of white space shows up to the right of the image. This shifts all of my other images 3px to the right (and 3 more for each link I add to subsequent images) thus making the total width of the navigation banner over 1000px and the last image gets shoved to a new line.

I can find no way to get rid of this white space other than to remove the link from the image. There is no property on the page that adds any sort of padding, margins, or borders to images or links, so I can see no property that has to be changed.

Help! How do I get rid of this white space but still keep the link on the image??

[I posted this question on the Adobe forum to no avail, below is a screencap I took of the issue I'm having]

Thanks in advance!
//kl

PS - I am using both IE8 and Chrome to view this webpage. I've set all the margins/padding/borders to 0px. Here is my CSS and the part of the code that pertains to the navigation banner.

CSS:
Code:

<style type="text/css">
<!--
body {
font: 100% Verdana, Arial, Helvetica, sans-serif;
background: #666666;
margin: 0; /* it's good practice to zero the margin and padding of the body element to account for differing browser defaults */
padding: 0;
text-align: center; /* this centers the container in IE 5* browsers. The text is then set to the left aligned default in the #container selector */
color: #000000;
background-image: url(images/blue.bg.png);
background-repeat: repeat;
background-color: #009;
}
.oneColFixCtr #container {
width: 1000px;  /* using 20px less than a full 800px width allows for browser chrome and avoids a horizontal scroll bar */
background: #FFFFFF;
margin: 0 auto; /* the auto margins (in conjunction with a width) center the page */
border: 0px solid #000000;
text-align: left; /* this overrides the text-align: center on the body element. */
}
.oneColFixCtr #mainContent {
padding: 0 20px; /* remember that padding is the space inside the div box and margin is the space outside the div box */
}
body, td, th {
color: #333;
}
#main_banner2 {
margin: 0px;
padding: 0px;
height: auto;
width: 1000px;
}
-->
</style>
 
</head>

Nav Banner:
NOTE:: below HAS to be all one paragraph because if i insert a carriage return in between images, it also adds the white space...
Code:

<body class="oneColFixCtr">
 
<!-- MAIN NAVIGATION BANNER -->  
<!--HOME--><img src="images/nav/home.png" alt="home" name="home" width="82" height="30" border="0" onMouseOver="document.images.home.src='images/nav/home_over.png'" onMouseOut ="document.images.home.src='images/nav/home.png'"/><!--PROGRAMS--><img src="images/nav/programs.png" width="111" height="30" border="0" name="programs" onMouseOver="document.images.programs.src='images/nav/programs_over.png'" onMouseOut ="document.images.programs.src='images/nav/programs.png'"/><!--SCHEDULE OF EVENTS--><img src="images/nav/scheduleofevents.png" width="189" height="30" border="0" name="scheduleofevents" onMouseOver="document.images.scheduleofevents.src='images/nav/scheduleofevents_ over.png'" onMouseOut ="document.images.scheduleofevents.src='images/nav/scheduleofevents.png'"/><!-- CONTACT US--><img src="images/nav/contactus.png" width="119" height="30" border="0" name="contactus" onMouseOver="document.images.contactus.src='images/nav/contactus_over.png'" onMouseOut ="document.images.contactus.src='images/nav/contactus.png'"/><!--DOWNLOADS--><i mg src="images/nav/downloads.png" width="267" height="30" border="0" name="downloads" onMouseOver="document.images.downloads.src='images/nav/downloads_over.png'" onMouseOut ="document.images.downloads.src='images/nav/downloads.png'"/><!--FACEBOOK--><im g src="images/nav/facebook.png" width="90" height="30" border="0" name="facebook" onMouseOver="document.images.facebook.src='images/nav/facebook_over.png'" onMouseOut ="document.images.facebook.src='images/nav/facebook.png'"/><!--TWITTER--><img src="images/nav/twitter.png" width="67" height="30" border="0" name="twitter" onMouseOver="document.images.twitter.src='images/nav/twitter_over.png'" onMouseOut ="document.images.twitter.src='images/nav/twitter.png'"/><!--BLOGGER--><img src="images/nav/blogger.png" width="75" height="30" border="0" name="blogger" onMouseOver="document.images.blogger.src='images/nav/blogger_over.png'" onMouseOut ="document.images.blogger.src='images/nav/blogger.png'"/><img src="images/home_banner.png" alt="home_border" width="1000" height="7" /><br />

So in January 2006 I posted a question about "making two buttons in one"



3 years and 5 months later i am happy to announce that I have found a solution.

Ok, so no I have not spent the last three years looking, but the need for one came around again yesterday so I revisited the project. All I needed was "simple" image toggle. Image 'A' click it once it changes to image 'B' click it again it changes back to image 'A'

All the "image toggle" codes I could find were extremely complex. I thought I had finally found one, it wasn't perfect, but it was the smallest and most basic thing I could find.

HTML Code:

<html>
<head>
<style type="text/css">
.on {background-image:url(playlist_btn.png); background-repeat:no-repeat;}
.off {background-image:url(playlist_btn_x.png); background-repeat:no-repeat;}
</style>

<script language="javascript">
function togglestyle(el){if(el.className == "on") {el.className="off";} else {el.className="on";}}
</script>

</head>

<body>
<div id="onoff" class="playlist_btn"><img src="blank.gif" width="50 height="50" onclick="togglestyle(onoff)"></div>
</body>
</html>

I tested it, it worked, so I considered problem solved. I placed it in my page and nothing. Turns out it wont work with a doc type - so it's useless.

Other problems, I'm not big on using "blank gif's" unless I have to, if you want multiple image toggles you need a new JS function for each one, and two lines of css as well. And, though I rarely use image rollovers anymore, it would certainly not be possible in this method.

So it was back to the drawing board. Well, I had actually already found the solution a few minuets prior to finding out that the above code is so good. I had coded a button that on rollover shows a tooltip, when you click the button, the text in the tool tip, changes, chick again and it reverts. All done with a simple showHide javascript function, that i am finfing out has many uses.

here is the awesome code:
Code:

function showHide(elementid){
if (document.getElementById(elementid).style.display == 'none'){
document.getElementById(elementid).style.display = '';
} else {
document.getElementById(elementid).style.display = 'none';
}
}

function hideShow(elementid){
if (document.getElementById(elementid).style.display == ''){
document.getElementById(elementid).style.display = 'none';
} else {
document.getElementById(elementid).style.display = '';
}
}

I wont take credit for the showHide code, but I will take credit for the hideShow portion, obviously a monkey could have coded the revers, but iot does make it that much more universal. As the original code was designed to show something that was hidden, add the revers to hide something that is showing and it's perfect.

Now I will take a moment to say, though I have yet to find a problem with the code, it seems to work in most browsers, firefox, ie, safari, and validates for WC3 - In sure it has it's flaws. Until now, to show and hide divs I had used the MM_showHideLayers JavaScript function, which by default used the visibility style. It is of course a good script, and has many uses, it's not very big, but it is somewhat complex. The other thing to think about is that invisible objects still take up space. That's what is cool about the display:none: style, is that is not only invisible but it doesn't take up space.

So here is how I used the above to JavaScript to make a simple onclick image toggle:

HTML Code:

<img id="on" src="on.png" width="50" height="50" onClick="javascript:hideShow('on'); javascript:showHide('off')" alt="on">
<img id="off" src="off.png" width="50" height="50" onClick="javascript:hideShow('off'); javascript:showHide('plus')" style="display:none;" alt="off">

Cool huh? Now this example does not have a rollover either, but since it uses to individual images and is not replacing one image wioth another you could easily apply a rollover to both images. But, hold on, look at the above code, isn't that essentially a rollover? Change the first onClick to onMouseOver and the second to onMouseOut and look at that a 'brand new' method for mouseovers.

So lets take a look at this for a second, and compare MM_swapImage to this new hideShow method. As far as CSS rollovers I definitely prefer them to the MM_swapImage method, as they use a minimal amount of code. However they actually take a lot of math, construction the buttons is somewhat tedious, because css buttons use 1 image and change it's position, to work well you have to use a "blank.gif" and the the css can really add up if you have a lot of buttons:

Also, you can't go directly to a button in the document, you have to fish through the css to make any adjustments. But they are fast, they don't need to be preloaded and... they are pretty cool. But anyway, swapImage and hideShow...



The left is the MM_swapImage method. Now when you use the swapImage js you also have to use MM_swapImgRestore, MM_findObj, MM_preloadImages. You don't have to use the preload script but it does make thing work faster... supposedly, but that requires a onload script in the body tag, and if you have a lot of rollovers your body tag can get really long really quick. So what are the advantages, well we know for sure it works, and you only need on image in the document, however actualy having the image you are "swapping" too actually in the document can add functionality.

So as you can see, on the right, the showHide method is, in total code, much smaller. True you do need to use two images, so the total code in the body is longer but, it's more than evened out bu the minimal JavaScript, and I think it's worth it. You don't need to use a preloader, you have full control over both images, the up and over state, and unlike the swapImage method, though it's rare you would need to, your up and over images can actually be different sizes, which is kind of cool.

So here's the basic code for a rollover:
HTML Code:

<img id="up" src="up.png" width="50" height="50" onMouseOver="javascript:hideShow('up'); javascript:showHide('over')" alt="up">
<a href="http://google.com"><img id="over" src="over.png" width="50" height="50" onMouseOut="javascript:hideShow('over'); javascript:showHide('up')" style="display:none;" alt="over" border="0"></a>

To add a link the button you just apply it to the "over state" image. And unlike swapImage, though it is overkill, you can also add a "downstate" image quite easily.

So, back to the on/off button here is how you would code it using showHide with rollovers.
HTML Code:

<img id="on" src="on.png" width="50" height="50" onMouseOver="javascript:hideShow('on'); javascript:showHide('onover')" alt="on">
<img id="onover" src="on_over.png" width="50" height="50" onMouseOut="javascript:hideShow('onover'); javascript:showHide('on')" onClick="javascript:hideShow('onover'); javascript:showHide('offover')"  style="display:none;" alt="onover">
<img id="off" src="off.png" width="50" height="50" onMouseOver="javascript:hideShow('off'); javascript:showHide('offover')" style="display:none;" alt="off">
<img id="offover" src="off_over.png" width="50" height="50" style="display:none;" onMouseout="javascript:hideShow('offover'); javascript:showHide('off')" onClick="javascript:hideShow('onover'); javascript:showHide('off')"alt="offover">

So here is what is going on:
you have the upstate on.png image, when you mouse over it on.png is hidden and on_over.png is displayed. When you click on_over.png it is hidden and off_over.png is display, mouse off it and off.png is displayed. Make scene?

Now be aware, when you click, you are also in a scene "mousing off" so some flickering can occur. Firefox handles everything pretty well, IE and Safari not so much. When you click the on_over.png the click tells it to hide on_over.png and show the off_over.png, at the same time the mouseoff tells it to hide on_over.png and show the on.png. So fortunately the toggle with rollovers isn't perfect, but perhaps some more tweaking of the code or maybe, in this case swapImage would work better to do the rollovers...

But all in all I'd say its a solid concept. If you feel compiled to do so, reply with any comments, concerns or flaws you see.