Image Object Src Not Accepting Absolute Paths?
Jul 9, 2010
My page accepts a url with various parameters passed in querystring. One of the parameter is the URL of the Image I wish to display on the page. I save this URL in a variable "imagesource"
To ensure the image is not bigger than the size permitted, I use image object to get the height and width of the image.
Now here's my code:
function foo(){
......
var imagesource = URL of the image;
....
var newImg = new Image();
[Code]....
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Nov 20, 2009
Although I have done a fair bit of html coding after taking several HTML courses, I have never become involved in JavaScript beyond adding the occasional pre-made script for a particular function.
Which is what I am trying to do at the moment. I want to insert a slide show into a page and have tried 2 scripts from Java Kit Scripts. Both are similar and I am having the same problem with both.
The problem: Inserting the image path. They both ask for the image path (naturally) and give the following examples:
Example 1:
Example 2:
But there is no reference to an "image" folder. I have tried inserting the folder name: "images/iss-bunker-1tn.jpg",
I have also tried leaving the word "images" out and also tried saving the related images in the same folder as the html coded pages. I have also tried using "shtml" pages. But nothing seems to work.
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Jun 15, 2011
I have a routine that centers an object. I pass it a string such as "#myid" and it sets the 'left' property based on the width of the object and of the monitor.
Now in theory I could just use <center> tags, but I'm trying to center an object that is positioned using the 'absolute' attribute. It seems that <center> tags have no effect on 'absolute' positioned objects.
(I need the 'absolute' because the screensscroll underneath it). Anyway, I've been told that this is bad practice, and positioning should always be done via css, and never jquery/javascript. But I don't see any other way to do this. Is there one?
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Mar 2, 2009
I'm trying to apply the "absolute" position to the DOM object for non-IE browsers but Mozilla (or Firefox) does not recognize it. But the top and left position works for the "div" tag though. The IE browser works fine though.[code]...
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May 9, 2009
I can't get my lightbox script to work. Also how do you set up absolute bottom for the image on my "artwork" page?
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May 13, 2011
I'm trying to make a countdown timer, it works fine if I define the value myself from where it has to start. However, when I try to take output from the user it says undefined and 'Nan'.Basically my problem is that if I give c a value like c = 30. it works fine. But when I try to take the input , it gives an undefined error.
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Dec 11, 2005
The two pages for preloading below seemed to preload images IF I used an absolute path but they don't preload the images if I just used relative paths like the ones below.
Give it a try. The two pages below using relative paths won't work. Then try changing the paths of the images in both pages to use absolute path(with http://) which will work.
But I want to use relative paths. What can be done? Other than inserting 1x1 size of the images I want to preload. Code:
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Jul 23, 2005
I am setting a cookie on a subdomain:
http://store1.mydomain.com
Then the store takes me to a shopping cart that is at:
http://shopping.mydomain.com
Somewhere the following code (taken and modified from The JavaScript Source)
is broken between domains, because when I click my "store" link that should
read the cookie and send me to store1.mydomain.com or storeN.mydomain.com I
get the default template store.
<SCRIPT LANGUAGE="JavaScript">
<!-- Original: Ronnie T. Moore -->
<!-- Web Site: The JavaScript Source -->
<!-- Begin
var expDays = 30;
var exp = new Date();
exp.setTime(exp.getTime() + (expDays*24*60*60*1000));
function getCookieVal (offset) {
var endstr = document.cookie.indexOf (";", offset);
if (endstr == -1)
endstr = document.cookie.length;
return unescape(document.cookie.substring(offset, endstr));
}
function GetCookie (name) {
var arg = name + "=";
var alen = arg.length;
var clen = document.cookie.length;
var i = 0;
while (i < clen) {
var j = i + alen;
if (document.cookie.substring(i, j) == arg)
return getCookieVal (j);
i = document.cookie.indexOf(" ", i) + 1;
if (i == 0) break;
}
return null;
}
function SetCookie (name, value) {
var argv = SetCookie.arguments;
var argc = SetCookie.arguments.length;
var expires = (argc > 2) ? argv[2] : null;
var path = (argc > 3) ? argv[3] : null;
var domain = (argc > 4) ? argv[4] : null;
var secure = (argc > 5) ? argv[5] : false;
document.cookie = name + "=" + escape (value) +
((expires == null) ? "" : ("; expires=" + expires.toGMTString())) +
((path == null) ? "" : ("; path=" + path)) +
((domain == null) ? "" : ("; domain=" + domain)) +
((secure == true) ? "; secure" : "");
}
function DeleteCookie (name) {
var exp = new Date();
exp.setTime (exp.getTime() - 1);
var cval = GetCookie (name);
document.cookie = name + "=" + cval + "; expires=" + exp.toGMTString();
}
var favorite = GetCookie('store');
if (favorite != null) {
switch (favorite) {
case 'store1' : url = 'http://store1.mydomain.com/'
break;
case 'store2' : url = 'http://store2.mydomain.com/'
break;
case 'store3' : url ='http://store3.mydomain.com/'
break;
case 'storeN' : url = 'http://storeN.mydomain.com/'
break;
}
window.location.href = url;
}
// End -->
</script>
</HEAD>
The cookie is set by a javascript "onload command" Like I said I have it
working on a server with no sub domain.
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Dec 15, 2009
I am slowly working through learning/writing a JS project.here is the core issue.:
var pt =<? echo json_encode($prt);?>
alert(pt) // for diagnostic purposes
json is flattening the PHP array to be used in the script.However, the alert shows me that I only get {[ ,which is just before the first set of double quotes.JS quits at the double quotes, leaving me with an undefined array.How do I fix this?
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Aug 11, 2010
I'm using getElementsByTagName() to retrieve some elements and do something with them. It works fine in FF but not in Chrome and Safari.
In Chrome it says: "Uncaught TypeError: Cannot call method 'getElementsByTagName' of null"
Here's the code:
Code:
function popUpSAPWindow(){
// Find all links in the page and put them into an array.
//Below is the line that gives me trouble
var linksInOrderLinesTable =
[Code]....
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Jan 29, 2006
I am trying to create a script that will cover cross-browser limitations in adding event listeners to elements. I have found plenty of resources to add a listener but can't find any way of assigning a function containing arguments. Here is what I have so far:
/* Attach events regardless of browser */
function addEvent(obj, evType, fn)
{
if (obj.addEventListener)
{
obj.addEventListener(evType, fn, false);
return true;
}
else if (obj.attachEvent)
{
var r = obj.attachEvent("on"+evType, fn);
return r;
}
else
{
return false;
}}
/* Contains all attachments to be made on page load */
function load()
{
item = document.getElementById('toggleControl');
addEvent(item, 'click', toggle);
item = document.getElementById('alertLink');
addEvent(item, 'click', runAlert);
}
/* Add event to page load and assign load() function */
addEvent(window, 'load', load);
The actual functions for toggle and runAlert are in a seperate .js file, but are standard functions. the problem is that I can't find a way to perform the equivalent of:
item = document.getElementById('toggleControl');
addEvent(item, 'click', toggle('toggleID'));
It simply does not work.
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Oct 12, 2011
I have a simple php webpage that links to an external javascript file:
But I want to avoid this:
I've seen so much on the web for Ajaz, ASPX etc. and it all looks a little confusing.
Using ../php/myphp.php works well for php files, what's the way to do it with javascript?
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Oct 3, 2009
If the parameter passed is �1�, it will generate an HTML of calculator 1.
If the parameter passed is �2�, it will generate an HTML of calculator 2.
I know how to write a calculator program in HTML format
but I am not sure how to write a jsp and accept a parameter and generate calculator 1/2. code...
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Nov 25, 2009
First the code:
Code:
Looking at the code, you might assume (as I did) that clicking the button on page1.htm would load page2.htm. However for some reason, when calling a parent function, the function runs with the calling file's path rather than the path of the parent.
So it is actually trying to load /files/files/page2.htm! How do I force all calls to parent.function() to run with parent.hta's path as the root?
Realize that this is a simplistic example and simple solutions such as putting all the files in the same path, or dropping the "/files" in the loadPage2() function are not valid solutions.
Essentially I need to call parent.loadPage2() and have it run the function with the root path = parent.hta's path.
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Jul 11, 2011
I am making a small gallery script. When a user clicks an image, I would like for a function to be called that tells the browser where that image is located in an object. For example:
[Code]...
It works, I just don't like it because it is messy and it seems sensible that some workaround exists.
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Jun 10, 2009
I have a LARGE, hi-resolution image that I am trying to use as the background for a page. Because it is so large, it takes a while to download. Because of this, I wanted to load the image behind-the-scenes and show it once it is downloaded.
To accomplish this, I'm using the following JQuery code:
This code clearly downloads an image and appends it to my DIV element. However, I really want to set this downloaded image to the background-image CSS property of my DIV. The reason why is because I have content inside the DIV that should serve as the foreground.
How do I dynamically download an image, fade it in, and use it as a background?
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Apr 15, 2011
I'm trying to make a autoclick script that clicks an image every five seconds. The problem is, this image doesn't have an id, and I have no idea how else to call it with a DOM thing.
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Jun 28, 2009
Before you immediately give me an answer, let me describe fully what I'm trying to do, as it's not as simple as the title suggests.
I need to get the absolute position of a DIV (top and left properties) relative to the viewport/screen.
I've tried using .offsetTop and .offsetLeft, but these return the top and left properties relative to the DIV's immediate parent element, not the viewport (unless of course the DIV is top-level and not contained in any other DIVs).
So, is there any way to retrieve the absolute position of a DIV relative to the viewport, even if that DIV is nested in other DIVs?
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Oct 25, 2011
[URL]
<style>
div#back{
width:1000px;
height:1000px;
margin-left: auto;
margin-right: auto;
background-color:#096;
}div#topmenu{
width:400px;
height:35px;
position:relative;
top:5px;
left:595px;
background-color:#9F0;
}div#logopart{
width:950px;
height:70px;
position:relative;
top:0px;
left:50px;
background-color:#0FF;
}div#leftmenu{
width:100px;
height:400px;
position:relative;
top:0px;
left:0px;
background-color:#999;
}div#cont{
width:900px;
height:500px;
position:relative;
top:0px;
left:0px;
background-color:#FF6;
}</style>...
<div id=back>
<div id="topmenu">topmenu</div>
<div id="logopart">logopart</div>
<div style='display:inline;'>
<div id="leftmenu">leftmenu</div>
<div id="cont">cont</div>
</div></div>
How do I put "cont" div on the right of "leftmenu" without using "absolute"?? The screenshot was little bit cropped out and there is no problem on width.
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Jan 18, 2009
Its said that placing the absolute div within a relative div is a best option to correctly achieve the margins within that relative div. However, I'm changing the marginTop and marginLeft via javascript and after some of the changes it shows the absolute divs in incorrect positions in IE.
What i want to do is calculate the vertical-middle right-sided position of text fields in x, y meaning in top and left margins. How can I do that?
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Jul 23, 2005
I can't get Opera to fire an event when an image object's src has
loaded. The test code I'm using is this -
---------------------------------
window.onload=go
function yo() {
alert("yo");
}
function go() {
//alert("go?");
var pic=new Image();
pic.onload=yo; // method 1
//pic.addEventListener("load",yo,false); // method 2
pic.src="serenity.jpg";
}
---------------------------------
Code is in a file on it's own referenced from the xhtml. Using either
of the two methods indicated the function yo doesn't get called.
Code works as expected in Firefox, Mozilla, Konqueror, IE. If I
uncomment the alert in go() I can see that go does actually get called.
Nothing comes up in Opera's Javascript console.
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Dec 8, 2005
I've search far and wide for an answer, so forgive me if this is a
stupid question. (Well, it probably is.)
Consider the following javascript:
var foo = new Image();
foo.src = "http://some.server.com/some_filename.gif";
Now, the browser will retrieve 'some_filename.gif' from some.server.com
and put it into the object foo. What I want to do is then subsequently
analyze the actual binary data contained inside some_filename.gif.
(Specifically, I just need to look at the first few bytes.) Is there
any way to do this in just JavaScript?
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Jun 7, 2007
Why is Image not mentioned anywhere as a global object? Or at least as
one of JavaScript's native objects? ....
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Dec 19, 2009
I'm trying to get the binary data of an image object.
I've found articles to writing binary to be the source of an image, but they don't tell you how to do the reverse. Pretty much, after the page loads I want to do something like.
myImg = document.getElementById('cow.jpg');
binData = myImg.somethingToGetBinaryDataPlese
For those that are curious why I'm doing this its for another project I'm working on where I store the binary data somewhere else after load, but for technical reasons this has to be done client side for if I do it server side I'm not getting the results I need for this project.
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Oct 16, 2010
I have this simple code here:
var container = document.getElementById(con);
var obj = container.getElementsByTagName('img');
And I want to get the full HTML image tag using the obj value, if you get what I mean. So I want to get this:
<img src="images/image_209948045.jpg" />
by using this: obj[0];
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Jan 14, 2011
I want to be able to place an image on the canvas and have an onclick event for that object.
Code:
<!DOCTYPE html>
<html>
<head>
[code]....
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