Simple Good Old Rollover
Aug 16, 2002
I got a simple rollover with a little twist to it… and I have a little glitch.
The two only images that I am trying to get to swap are:
Button_on.jpg
Button_off.gif
That’s it. And it’s the same images for all 5 links
This means that …
all 5 links should start with button_off.gif. And any of the 5 links should swap to button_on.jpg when I get my mouse over it--while all others remain with button_off.gif.
The rollover works, but the only image that swap is on link #5. That is whether I bring my mouse to link #1 or link#2 or any other link. The only image that keeps swapping is link #5.
Check it out and try moving your pointer over the links and you’ll understand
MY TEMPLATE
Afterward, I’ll add text links above these rollovers using CSS. PS: is there a way to create a similar effect using CSS?
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Feb 15, 2010
This code works:
Code:
<html>
<script language="Javascript">
if (document.images) { [url].....
What happens: You see both image1 and image3, but when you mouse over either of them, nothing happens...So I'm trying to have "multiple images" rollover...
Edit: So by adding in the red, that's when all rollovers cease to function.
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May 10, 2009
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Nov 18, 2005
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Invoking this script with an onmouseover() event in an image or link tag works as expected in IE, but not in Firefox. My guess is there is some minor error that FF is being extra-picky about. Code:
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Aug 28, 2010
I've tried to make a simple hover effect about small images but it won't work. I also tried to make the following script: 2 seconds after page loading image1 changes 2 seconds after that image1 returns to back state and image2 changes and etc.
<html>
<head>
<style type="text/css">
#as:hover{
background-image: url(images/numr.png);
} #ad:hover {
background-image: url(images/numr.png);
}#af:hover{
background-image: url(images/numr.png);
}
</style>
</head>
<body>
<input type="image" src="images/num1.png" id="as">
<input type="image" src="images/num2.png" id="ad">
<input type="image" src="images/num3.png" id="af">
</body>
</html>
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Aug 20, 2011
I am having a bit of trouble attempting to get this button roll over stuff working. I have looked up some really simple code to create a image rollover action for my navigation buttons. But nothing happens when I hover on any of the buttons though. When I use firebug to figure out what is wrong, it says that $(this) is the document and not the image button. The example/preview is here: [URL].
This is the jQuery code here for quick reference:
<script type="text/javascript">
$(document).ready(function(){
$('#navigation img').hover(
function() {
$(this).src = $(this).src.replace("Red","Yellow");
}, function() {
$(this).src = $(this).src.replace("Yellow","Red");
}); });
</script>
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May 31, 2011
6. Display a message saying Good Morning if it is in the morning, Good Afternoon if it is in the afternoon, and Good Evening if it is in the Evening. This is my code:
[Code]....
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Jun 5, 2010
I have navigation buttons that I'll call primary buttons. I also have secondary navigation buttons that I'll call secondary buttons. If you rollover a primary navigation button, it should make secondary navigation buttons 1,4,and 5 go to rollover state A. However, if you rollover secondary navigation button 1,4 or 5 they should go to rollover state B.So the simplest way I can explain it is that the secondary navigation buttons need two rollover states possible.
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May 11, 2010
Before, I had an iframe, and when I moused over a link outside the iframe, it would load a page into the iframe. Background image was part of the page loaded, as well as the text and what not. The problem was, the image took too long to load. I've been learning how to do javascript and I came across some code for preloading an image before the mouseover so there was zero wait time. For the past few days I've been trying to figure out how to have the preload image appear BENEATH the iframe (now with no background image or color) with the allowtransparency attribute set to true.
I've figured out the code to do both individually, i.e. I have the code so that when the link is moused over, the new image will appear; AND I have the code so that when the link is moused over, the page with load into the iframe. Both work, both do what is expected, but they don't do it together.Below is the script. Here's where it's confusing. If I have the "setupImgRollover..." first inside the if statement: the page loads into the iframe, but there is no image. If I have the "setupImgRollover..." after the "document.link..." commands in the if statement: the image appears but the page does not load into the iframe.
HTML Code:
window.onload = rolloverInit;
function rolloverInit() {
for (var i=0; i<document.links.length; i++) {
var linkObj = document.links[i];
[code]....
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what do you use firebug for in connection with javascript?
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Apr 8, 2006
I want to have some advice about immutable objects. I made a constructor.
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This is a very simple one and now I want to make it immutable so that
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I came up with 2 ways.
[1]
function Point(x, y) {
this.x = function() { return x; }
this.y = function() { return y; }
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[2]
function Point(x, y) {
this.getX = function() { return x; }
this.getY = function() { return y; }
}
They are both immutable.
You can read x and y but cannot change them.
[1] is short and easy to use but sometimes likely to be error-prone
like
var p = new Point(2, 3);
var x = p.x; //should be p.x() instead of p.x
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I have to access the data like p.getX() .
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And is there a better way to make an immutable object?
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Jul 23, 2005
I have still yet to see a JavaScript Editor that comes close toreading a good JS book, learing it and using it with a text editor.
Anyway, here my recipe for build successfull DHTML Applications:
If you want to support only M$ IE stop here and do the following:
1) Install blindfold
2) Repeat the phrase - I love my cage :p
Buy the Book: Buy O'Reilly's JavaScript The Definitive Guide
~ The best damn JS guide & reference period, end of story, finito
Get a good Text Editor with Syntax Highlighting support
~ Real programmers don't use WYSIWYG tools
~ You will never learn with these tools
~ Code is always inefficient
~ Apps to Use:
~ OSX - BBEdit - Powerful but no MDI support :(
~ Win32 - UltraEdit - Low cost, high power, competent
yntax Highlighting
~ ^nix - Kate or KDevelop - Well written but needs KDE (big)
~ Does not work with OSX's X11 Client :[ - ('+' key
doesn't work)
Browser Development Platform
~ Mozilla (1.3+) (FireFox release suggested)
~ Why Moz?
~ Mozilla based development works in:
~ IE 95% of the time
~ Konquorer (KDE/Apple...), Opera 99%+ of the time
~ Why not IE?
~ IE based development works in standards based
browsers only 50% of the time
~ IE black hole methods (non standards based) causes
people to ignore standards based DHTML objects,
properties and methods.
~ Browser Support Baseline
~ IE 5.5sp2+
~ This is the first (reasonably) stable
version of IE for advanced JS coding.
~ When ever I experience weird bugs from users I have them
them upgrade to IE5.5sp2+ and it goes away.
~ Netscape 6.n+
~ Netscape 4.7 should not be supported!
~ Opera ? (I plead ignorance here)
~ Konquorer/Safari ? (I plead ignorance here)
Debugging Methodology:
~ Use JS Console (Moz)
~ Put try/catches at all error prone functions / methods
~ Because of IE's error stupidity, you should get as
close to the source as possible.
~ Read stack property of error in Mozilla to
read stack of error (powerful)
~ Install JavaScript Console Status in Mozilla
~ Use window.onerror handler
~ In IE, read arguments.callee.caller... to read stack
~ Goes only to last error throw point ! not error source
point :[
~ Note: at this time, there is no way to to get to
the Error object in Mozilla from this handler.
Therefore no stack in Moz. Use Try/Catch instead
Add the following code to every page:
_w=window
function getElem(s){return document.getElementById(s)}
function getEvent(e){ return is.ie?_w.event:e }
Event Declaration
~ Avoid using inline javascript declarations (In HTML Tags)
~ Inline declarations is where you call a function or
run code from the html elements definition
(onclick="<RunSomeCode>")
~ This technique will not allow you to access
the event argument in Mozilla...
~ Instead use getElem("<Element ID>").onclick=<function name>
~ Declare handlers like:
function mySlickFunction(e){e=getEvent(e)...
~ This will ensure you always have Event Object
~ If you want to get fancy you could normalize the Event
at getEvent()
~ Method Declaration
~ Declare <obj>.<meth>=function <obj_acro>_<event>(args){
~ Example: myObj.smile=function MO_smile(args){...
~ Why? - When you build you're stack in the debug
you get the method names!
Other Stuff:
~ Use JSON (www.json.org) as much as possible to nest data
structures (for more complex programming).
~ JSON is fast (primitively supported), stable easy to read.
Could anybody else add to this list?
If people are interested, I can make a document and add other stuff
like JS debugging libraries, Consoles and other slick JS Debugging
stuff.
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Any reasons why NOT to use this property?
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Can someone tel me how to detect mouse pointer
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