Develop Reference

How do I force any iframe content to appear on top if changed, without changing the attributes in the links?

How do I force any iframe content to appear on top if the content is changed as if the link had the target="_top" attribute...
EXAMPLE 1: Normally this code is what would be applied in a page.
<script src="http://code.jquery.com/jquery-1.8.1.min.js"></script>
<script type="text/javascript">
if(top!=self){
top.location.replace(document.location);
alert("For security reasons, framing is not allowed; click OK to remove the frames.")
}
</script>
But I need to aply it to the iframe instead, and fire it only if the iframe is changed. How do I do that?
For example, I click on a link within the iframe, once that page changes URL then the iframe puts the page on target="_top" without having attributes for it in the iframe URL page, but the attributes for it should be from the iframe page itself.
EXAMPLE 2:
I have found a code that works as it should, the problem is only that it only fires when clicked on a button. Can I somehow make it to fire automatically when content of the iframe changes?
JavaScript:
<script type="text/javascript">
//<![CDATA[
$(window).load(function(){
document.getElementById('example-button').addEventListener('click', function (ev) {
ev.preventDefault();
var win = open('about:blank');
var iframe = document.getElementById('example-iframe');
setTimeout(function () {
var body = win.document.body;
body.style.padding = 0;
body.style.margin = 0;
body.appendChild(iframe);
iframe.style.position = 'fixed';
iframe.style.padding = 0;
iframe.style.margin = 0;
iframe.style.width = '100%';
iframe.style.height = '100%';
iframe.style.border = 0;
}, 100);
win.addEventListener('beforeunload', function () {
document.getElementById('example-container').appendChild(iframe);
iframe.style.position = '';
iframe.style.padding = '';
iframe.style.margin = '';
iframe.style.width = '';
iframe.style.height = '';
iframe.style.border = '';
});
});
});
//]]>
</script>
HTML:
<button id="example-button">open in new window</button>
<div id="example-container">
<iframe id="example-iframe" src="https://example.com/">
</iframe>
</div>

After fiddling and putting together with loads of ideas given online by others I came up with a solution that is 70% correct.
Now the only thing that remains is how to make it react ONLY when the iframe URL changes and not when loading like now.
JavaScript:
<script language="JavaScript">
function GoToURL()
{
var URLis;
URLis = document.URLframe.u.value
{
var location= (URLis);
window.open(location, '_blank');
}
}
</script>
HTML:
<form name="URLframe" id="URLframe" method="post">
<iframe id="test" src="https://example.com" onload="GoToURL(this);"></iframe>
<input type="hidden" name="u" size="71" value="" placeholder=" URL " id="SeekBox" onkeypress="handleKeyPress(event)">
<script type="text/javascript">
(function() {
document.getElementById('SeekBox').value = document.getElementById('test').src;
})();
</script>
</form>
To test it easier I used these codes at the bottom instead:
<iframe id="test" src="https://www.4shared.com/privacy.jsp" onload="loadurl();" width="100%" height="528px"></iframe>
<input type="text" name="u" size="71" value="" placeholder=" URL " id="SeekBox">
<input type="button" id="SeekButton" onclick="GoToURL(this);" value=" go ">
<input type="button" id="SeekButton" onclick="loadurl();" value=" load url ">
<input type="button" id="SeekButton" onclick="alerturl();" value=" alert url ">
<script type="text/javascript">
function alerturl() {
alert($('iframe').attr('src'));
}
</script>
<script type="text/javascript">
function loadurl() {
document.getElementById('SeekBox').value = document.getElementById('test').src;
}
</script>

If I understand you correctly then you want to get the src of the iframe any time there is a change within the iframe and then open a window with that src. If I'm right then it doesn't seem like it's possible. I tried to get the source of the iframe using this little bit of code but to no avail.
<iframe id="test" src="justanotherwebsite.com" onLoad="iframeLoad()"></iframe>
<script>
var counter = 0;
function iframeLoad(){
if (counter > 0){
console.log($('#test').attr('src'));
}
counter ++;
}
</script>
Let me know if I'm way off the mark on this and I'll have another look.

How do I make a button / link to show Source Codes inside <iframe> instead of a page?

How do I make that when I click on a button / link instead of a page, that the button / link shows the source codes of a page in the iframe it targets? On an iframe who normally has a page on...
That is if to do that is even possible. But if it is then that would be great, because my page has a container iframe showing a web page and if by clicking a button / link that iframe could show the source codes of the page too, that would be perfect.
I tried:
<a class="button" href="view-source:Func/Math_Calculator_Func.html" target="IFrWin">Show the Source Code for the math function</a>
<iframe src="Func/Math_Calculator_Func.html" name="IFrWin" id="IFrWin" width="100%" height="748px" scrolling="auto" style="overflow:auto; overflow-y:hidden; overflow-x:auto;" valign="middle" align="center" border="0" frameborder="no" noresize></iframe>
I also tried:
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<script type="text/javascript">
function viewsource()
{
var oldHTML = document.getElementById('para').innerHTML;
var newHTML = "" + oldHTML + "";
var newHTML = newHTML.replace(/</g,"<");
var newHTML = newHTML.replace(/>/g,">");
var newHTML = newHTML.replace(/\t/g," ");
document.getElementById('IFrWin').innerHTML = newHTML;
var myIFrame = document.getElementById('IFrWin');
myIFrame.src=javascript:'"+newHTML+"'";
}
</script>
<input type="button" onclick="viewsource();" value=" View Source TEST "/>
<iframe src="Func/Math_Calculator_Func.html" name="IFrWin" id="IFrWin" width="100%" height="748px" scrolling="auto" style="overflow:auto; overflow-y:hidden; overflow-x:auto;" valign="middle" align="center" border="0" frameborder="no" noresize></iframe>
Both of them did not work.

If you are the owner of the source files, you can easily create a copy of the files, change their type to *.txt and simply change the source of your iframe to the given document.
This might work out with something along the way of this, you would just have to add the toggle mechanism.
document.getElementById('iframe').src = 'path/to/file.txt';

<html>
<head>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js" /> </script>
<script type="text/javascript">
function viewsource(){
$.get('Func/Math_Calculator_Func.html', function(data) {
var oldHTML = data;
var newHTML = "" + oldHTML + "";
var newHTML = newHTML.replace(/</g,"<");
var newHTML = newHTML.replace(/>/g,">");
var newHTML = newHTML.replace(/\t/g," ");
document.getElementById('iframe1').innerHTML = newHTML;
var myIFrame = document.getElementById('iframe1');
myIFrame.src="javascript:'"+newHTML+"'";
return1(); //call this function to show alert
});
}
</script>
</head>
<body>
<iframe src="" width="555" height="200" id="iframe1"></iframe>
<input type='button' onclick='viewsource()' value='View Source'/>
</body>
</html>
worked me..!! first check own then to integrate..set file path correctly..
any other doubt plz comment me...

How to switch 4 images using a button

<html>
<head>
<title>How To Insert an Image</title>
<script>
function changeImage(){
var img = document.getElementById('image');
image.src='image4.jpg';
}
</script>
</head>
<body>
<img id="image" src="image1.jpg" />
<br><br><br>
<button id="clickme" onclick="changeImage();">Click to change image!</button>
</body>
</html>
I am quite new to Javascript so please dont be too harsh. Basically im trying to switch from one picture to another using a button. So far with this code i have only managed to do 2 images but when i try to add a 3rd or 4th the first image messess up. I was hoping if someone could help me fix this problem.

Here's simplest approach the I used before, for two images. Easily extended to accomodate three, four, or more alternate images.
<div id="image1">
<img ... >
<button ...>
</div>
<div id="image2" style="display: none">
<img ... >
<button ...>
</div>
That is, put the first image, and a button, inside a "< div >" element, and a second image, and a button inside a second "< div >" element that's initially hidden.
Then, each button's javascript simply needs to set its own div's CSS style to "display: none", and remove this style from the other div element, effectively hiding one image, and displaying the other one.
This approach also makes it possible to update the button's text or label, accordingly. If both buttons have the same label, the only apparent result is the image change.

Try this script block instead:
<script>
var images = ['image2.jpg', 'image3.jpg', 'image4.jpg', 'image1.jpg']
function changeImage() {
var img = document.getElementById( 'image' )
var url = images.shift() // remove first url from list
image.src = url // use it
images.push( url ) // append url to the end of the list
}
</script>

What you could do is declare an array which contains all your image urls:
var imageUrls = ["image2.jpg", "image3.jpg", "image4.jpg", "image1.jpg"];
Then when clicking the button, you remove the first image url from the the array by using shift and assign that to variable imageUrl.
Then you set that imageUrl to the src attribute of the image element on your page.
Then you add that imageUrl at the end of the array using push.
This will rotate the images in the imageUrls array on every click.
<html>
<head>
<title>How To Insert an Image</title>
<script>
var imageUrls = ["image2.jpg", "image3.jpg", "image4.jpg", "image1.jpg"];
function changeImage(){
var img = document.getElementById('image');
var imageUrl = imageUrls.shift();
img.src = imageUrl;
imageUrls.push(imageUrl);
}
</script>
</head>
<body>
<img id="image" src="image1.jpg" />
<br><br><br>
<button id="clickme" onclick="changeImage();">Click to change image!</button>
</body>
</html>

You were very close! You just made mistake to assign a value to image.src instead of img.src. have a look at the code below :)
Using clicks:
<html>
<head>
<title>How To Insert an Image</title>
<script>
i = 1; /*Default value, only executed when the page is loaded (default is the first image, so when i + 1 the second image is displayed on first click.)*/
function changeImage(){
var img = document.getElementById('image');
i = i + 1; /*next image*/
if(i == 5) /* if end is reached, reset to first image*/
{
i = 1;
}
img.src='http://www.keenthemes.com/preview/metronic/theme/assets/global/plugins/jcrop/demos/demo_files/image' + i + '.jpg'; /*number to text in variable, so image + 'number of the image (i)' + extension(.jpg in this case)*/
}
</script>
</head>
<body>
<img id="image" src="http://www.keenthemes.com/preview/metronic/theme/assets/global/plugins/jcrop/demos/demo_files/image1.jpg" height="100px" />
<br><br><br>
<button id="clickme" onclick="changeImage();">Click to change image!</button>
</body>
</html>
Automatic image slider
<html>
<head>
<title>How To Insert an Image</title>
<script>
i = 1; /*Default value, only executed when the page is loaded (default is the first image, so when i + 1 the second image is displayed on first click.)*/
setInterval(function changeImage(){
var img = document.getElementById('image');
i = i + 1; /*next image*/
if(i == 5) /* if end is reached, reset to first image*/
{
i = 1;
}
img.src='image' + i + '.jpg'; /*number to text in variable, so image + 'number of the image (i)' + extension(.jpg in this case)*/
}, 5000)
</script>
</head>
<body>
<img id="image" src="image1.jpg" height="100px" />
</body>
</html>

How To Change Image And Link On Click As Toggle Function?

I want a Pure JavaScript code that will change an image and also its link to another image and another link on same place as toggle function. I have a web page and I have Anchors Links button as <img src="DownArrow.png"/> and I want that after clicking on this image, first it will lead you to the DIV2 and then it will change the code to <img src="UpArrow.png"/>. How to do this using pure JavaScript? Waiting for perfect reply and code?

This should work:
var link = document.querySelector('#arrow a');
link.onclick = function() {
var image = document.querySelector('#arrow a img');
if(this.href.slice(-1) === '1') {
this.href = '#DIV2';
image.src = 'https://cdn1.iconfinder.com/data/icons/nuvola2/48x48/actions/1uparrow.png';
} else {
this.href = '#DIV1';
image.src = 'https://cdn1.iconfinder.com/data/icons/nuvola2/48x48/actions/1downarrow.png';
}
}
See it in action here: http://jsfiddle.net/TM9ap/7/
Note that I've changed the href attribute in the link to #DIV1 like this <a href="#DIV1">

<!DOCTYPE html>
<html>
<title></title>
<head></head>
<body>
<a href = "#DIV1" style="color:BLACK;" onclick="execute();">Click me
<img src="UpArrow.png" />
</a>
<div id="DIV1" ></div>
<div id="DIV2" ></div>
<script>
function execute()
{
if ( document.getElementsByTagName("a")[0].getAttribute("href")==="#DIV1"){
var img = document.getElementsByTagName("img")[0];
img.setAttribute("src","DownArrow.png");
img.parentNode.setAttribute("href","#DIV2");
}
else
{
var img = document.getElementsByTagName("img")[0];
img.setAttribute("src","UpArrow.png");
img.parentNode.setAttribute("href","#DIV1");
}
}
</script>
</body>
</html>

javascript image rollover inside div

i have a single div 100px X 300px. What's the easiest way in JavaScript so when I hover over the div i show an image and then when i leave the div the image disappears.
for starters i thought the following would get me started but i can't seem to remove the image properly
<script type="text/javascript">
function MouseOver_Event(elementId) {
var imgToCreate = document.createElement('img');
imgToCreate.setAttribute('id', 'imgHandle');
imgToCreate.setAttribute('src', elementId + '.png');
imgToCreate.setAttribute('onmouseout', 'MouseOut_Event('+elementId+')');
var targetDiv = document.getElementById(elementId);
targetDiv.appendChild(imgToCreate);
targetDiv.removeAttribute('onmouseover', 'MouseOver_Event');
}
function MouseOut_Event(elementId) {
var imgToRemove = document.getElementById('imgHandle');
var targetDiv = imgToRemove.parentNode();
if (imgToRemove != null)
targetDiv.removeChild(imgToRemove);
targetDiv.setAttribute('onmouseover', 'MouseOut_Event(' + elementId + ')');
}
</script>
</head>
<body>
<div id="div1" onmouseover="MouseOver_Event(this.id)"></div>
<div id="div2" onmouseover="MouseOver_Event(this.id)"></div>
<div id="div3" onmouseover="MouseOver_Event(this.id)"><img src="Div3.png" alt="test" onmouseout="MouseOut_Event(parentNode's id or something)" /></div>
</body>

You're attaching your MouseOut_Event to onmouseover instead of onmouseout. But you probably don't need to be messing with dynamic event creation anyway; just add onmouseout="MouseOut_Event(this.id)" to the three divs and that should do it.

Why don't you use CSS instead ?
For example:
#div1{background:none;}
#div1:hover{background:url('src/div1.png') no-repeat;}