Develop Reference

javascript: hide the div if external .php file has .. inline style never changes

story: hide the iframe if the .php is deleted or similar. So i try to hide the div that contains the iframe. Website of customer A can iframe a video from my website (external-website). But if the video is deleted, it should hide the complete iframe (the div). The complete php will be deleted or renamed if the video is not available.
Hide the <div> if external file (i want to iframe)
is not available or named as .php?=123456 or has not a <div "id", whatever.
The inline style never changes.
I tried each of this above, i don`t get it working.
I can edit the external .php file (my website too).
I do not get the script to change the inline style whatever i try.
What i want to do, hide the div if "something".
<div id="hide-me">
<iframe src="https://www.external-website.com/subfolder/1250.php" style="background-color: white;border: 0;height: auto;text-align:center;width: auto;max-height: 100%;" scrolling="no"></iframe>
</div>
<script>
function yourFunctionName () {
var anyname = document.getElementById("hide-me").style.display;
if(document.getElementById("id-in-external-php").src == 'https://www.external-website.com/subfolder/1250.php'){
document.getElementById("hide-me").style.display="block";
} else {
document.getElementById("hide-me").style.display="none";
}
}
</script>
I asked a similar question here, but it did not give a solution
enter link description here
content of https://www.external-website.com/subfolder/1250.php :
<div id="id-in-external-php">this is content for the iframe</div>

This is how I ran your code again and it worked, so you can try it:
<div id="hide-me" style="display: none;">
<iframe style="display: none;" id="id-in-external-php" src="https://www.external-website.com/subfolder/1250.php" style="background-color: white;border: 0;height: auto;text-align:center;width: auto;max-height: 100%;" scrolling="no"></iframe>
</div>
<script>
const yourFunctionName = () => {
const anyname = document.getElementById("hide-me");
const frameId = document.getElementById("id-in-external-php");
const check = frameId.contentDocument.body.children
const c = check[0].innerText;
if(c.startsWith('Cannot')) {
anyname.style.display="none";
frameId.style.display="none";
} else {
anyname.style.display="block";
frameId.style.display="block";
}
}
window.addEventListener("load", yourFunctionName, false);
</script>
I did not see where you invoked the function, so i invoked mine when window load

Adding HTML slideshow to multiple pages (without using frames)

I am new to the site (and coding) so please bear with me!
I am trying to add the following clickable slideshow to my site in a way that means I can change the images in one file (HTML or JS) and this be reflected on every page on which the slideshow is called:
<table border="0" cellpadding="0">
<td width="100%">
<img src="image1.bmp" width="200" height="200" name="photoslider"></td>
</tr>
<tr>
<td width="100%">
<form method="POST" name="rotater">
<div align="center">
<center><p>
<script language="JavaScript1.1">
var photos=new Array()
var text=new Array()
var which=0
var what=0
photos[0]="image1.bmp"
photos[1]="image2.bmp"
photos[2]="image3.bmp"
text[0]="Image One"
text[1]="Image Two"
text[2]="Image Three"
window.onload=new Function("document.rotater.description.value=text[0]")
function backward(){
if (which>0){
window.status=''
which--
document.images.photoslider.src=photos[which];
what--
document.rotater.description.value=text[what];
}
}
function forward(){
if (which<photos.length-1){
which++
document.images.photoslider.src=photos[which]
what++
document.rotater.description.value=text[what];
}
else window.status='End of gallery'
}
function type()
{
alert("This textbox will only display default comments")
}
</script>
<p><input type="text" name="description" style="width:200px" size="50">
<p><input type="button" value="<<Back" name="B2"
onClick="backward()"> <input type="button" value="Next>>" name="B1"
onClick="forward()"><br />
</p>
</center>
</div>
</form>
</td>
</tr>
Currently I have used:
<script type="text/javascript" src="images.js"></script>
in the relevant html div. to call a simple .js file which displays the images in one long list, e.g.
document.write('<p>Image One</p>')
document.write('<img src="image1small.png" alt=Image One; style=border-radius:25px>')
document.write('<p>Image Two</p>')
document.write('<img src="image2small.png" alt=Image Two; style=border-radius:25px>')
I have tried every way I can think of, and searched many posts on here to try and get the slideshow to display within the same div. I have copied the html code into the .js file and appended it with document.write on every line, I have tried / on every line, I have tried 'gettingdocument.getElementById', but nothing works!
The slideshow code itself is fine; if I put this directly onto each page then it works correctly, I just can't seem to 'link' to this code and have it run so anything appears.
Please provide the simplest possible solution for this, without any need to install jquery plugins, or use anything other than basic HTML and JS.

There were alot of small bugs, i fixed them for you. you didn't put a semicolon after your javascript statements, tey aren't neccesary but it's cleaner code, you didn't exit alot of html tags
<table border="0" cellpadding="0">
<tr>
<td width="100%">
<img src="image1.bmp" width="200" height="200" name="photoslider">
</td>
</tr>
<tr>
<td width="100%">
<form method="POST" name="rotater">
<div align="center">
<center>
<p>
<p id="description" style="width:200px" size="50"></p>
<p><a onClick="backward()"><img src="imageback.png" alt="back" />Back Image</a>
<p><a onClick="forward()"><img src="forward.png" alt="forward" />Forward Image</a>
</p>
</center>
</div>
</form>
</td>
</tr>
Javascript:
(function() {
var photos=[];
var text= [];
var which=0;
var what=0;
photos[0]="image1.bmp";
photos[1]="image2.bmp";
photos[2]="image3.bmp";
text[0]="Image One";
text[1]="Image Two";
text[2]="Image Three";
document.getElementById('description').innerHTML = text[0]
backward = function(){
if (which>0){
which--;
window.status='';
what--;
console.log(which);
document.images.photoslider.src=photos[which];
document.getElementById('description').innerHTML = text[what];
}
}
forward = function(){
if (which < (photos.length-1)){
which++;
console.log(which);
document.images.photoslider.src=photos[which];
what++;
document.getElementById('description').innerHTML = text[what];
}
else {
document.getElementById('description').innerHTML = 'End of gallery';
}
}
function type()
{
alert("This textbox will only display default comments")
}
})();
And last but not least i've created the fiddle to show you it's working:
http://jsfiddle.net/45nobcmm/24/

You can create a javascript file that search for an element and change the innerHTML of the element to the slideshow you want to show.
For example this could be the script:
var slideshow = document.getElementById('slideshow');
slideshow.innerHTML = 'Your slideshow html';
and your main html page should have a slideshow div.
but you need to know that it's not the best solution, you should learn PHP or another back-end language and than you could use include('page.html'); for example

Javascript - JQuery : Cannot find id and .html("") or getElementById and set the innerHTML

I'm new to jQuery and can't add innerhtml to a div.
I have tried getElementById and also $('').html().
My javascript
var dishes = arg;
var starterDish = dishes[0];
var mainDish = dishes[1];
var dessertDish = dishes[2];
location.href=$('#finishButton').attr('href');
//The new HTML file
alert($('#starterDishName').html());
// will only return unidentified
$('#starterDishName').html(starterDish.name);
$('#starterDishPrep').html(starterDish.description);
$('#mainDishName').html(mainDish.name);
$('#mainDishPrep').html(mainDish.description);
$('#dessertDishName').html(dessertDish.name);
$('#dessertDishPrep').html(dessertDish.description);
run4 = false;
and the finish.html file:
</div>
<div id="starterDishName" align="center"> <h3>blablabla</h3></div>
<div id="starterDishPrep" align="center"> </div>
<div id="mainDishName" align="center"> <h3></h3></div>
<div id="mainDishProp" align="center"> </div>
<div id="dessertDishName" align="center"> <h3> </h3></div>
<div id="dessertDishProp" align="center"> </div>
</div>
I think the problem is located: location.href=$('#finishButton').attr('href');
and that the new html file wont allow me to use the ID's get?
QUESTION:
How can I get the id of the new html file and change the innerhtml of it from my code's perspective?

I assume you have this in a JavaScript file as you wrote: "My .js". And if you have included it in the head-section of your HTML the script is executed immediately and the selectors are not aware of all the HTML elements. Using jQuery you can simply wrap everything into a closure as this will get executed after the DOM is parsed:
$(document).ready(function() {
// your logic goes here
});

var id = document.getElementById('id').innerHTML;

Cannot access Preview button in Report View from button in DIV on same ASPX page

<div id='popup'>
<input id='btnConfirm'/>
</div>
$("#btnConfirm").click(function () {
var frame = $('#[id$=ReportViewer1ParameterArea]'); //get the frame
//s57 is a table element in the viewer
frame.contents().find("#Preview")
.click(
function () {
alert('hover!');
}
);
});
Below is part of the HTML rendered by Telerik Report Viewer
<iframe id="ctl00_ctl00_MainContent_MainContent_ReportViewer1ParametersArea" scrolling="auto" width="100%" height="0px" frameborder="0" align="left" src="/Telerik.ReportViewer.axd?instanceID=0001be3494c046c69b091014203c2914&culture=en-US&uiculture=en-US&optype=Parameters" style="height: 26px;">
<table id="parametersTable" cellspacing="0" cellpadding="0" border="0" style="width:100%;border-collapse:collapse;">
<tr id="parametersRow">
<td valign="middle" align="center" rowspan="2">
<input id="Preview" type="submit" onclick="return ParametersPage.Validate();" value="Preview" name="Preview">
</td>
</tr>
Question :
I need to access the Preview button ID="Preview" in the Report Viewer from a DIV that contains button with ID= btnConfirm on the ASPX page as given above in the JQuery script. The ASPX page contains the Telerik Report Viewer. I put code in the
$("#btnConfirm").click(function () event but that does not work. Can you give me ideas please?

Try using this selector:
var frame = $('[id$="ReportViewer1ParameterArea]"');
Removing the # and adding quotes " around the value.

The below code is what I developed to make my code work:
var reportFrame = document.getElementById('ctl00_ctl00_MainContent_MainContent_ReportViewer1ParametersArea');
var reportDocument = reportFrame.contentWindow.document;
var body = reportDocument.getElementsByTagName("body")[0];
$(body).contents().find("#Preview").click();

Can't make JavaScript work, is it an ID issue?

I'm trying to get a message to appear when a user clicks the image that's in a the "lifeCalculatorButton" ID, but I can't figure out how to make it work. I know that the html doc is referencing the js doc fine, so that's not the issue. Any ideas?
<html>
<head>
<link rel="Stylesheet" type="text/css" href="apps.css" />
<script type="text/javascript" src="apps.js"></script>
<title>my apps</title>
</head>
<body>
<div id="breaks">
<a href="http://info" > <img src="homeicon.png" /> </a>
<br>
<br>
<br>
<br>
<br>
<div id="appTable" style="float: left">
<table border="0" id="appTable">
<tr>
<td>life calculator</td>
</tr>
<tr>
<td>punny!</td>
</tr>
<tr>
<td>drink roulette (on its way!)</td>
</tr>
</table>
</div>
<div id="arrowTable" style="float: left">
<table border="0">
<tr>
<td id="lifeCalculatorButton"><img src="arrow1.png" width="45"</td>
</tr>
<tr>
<td id="punnyButton"><img src="arrow1.png" width="45"/></td>
</tr>
<tr>
<td id="drinkRouletteButton"><img src="arrow1.png" width="45"/></td>
</tr>
</table>
</div style="clear: both">
<div id="content">
my apps :)
</div>
And here's the JavaScript:
var foo = document.getElementById('lifeCalculatorButton');
foo.onClick = function (){
document.getElementById('content').innerHTML = 'foo';
};

Try changing the onclick event to all lowercase.
var foo = document.getElementById('lifeCalculatorButton');
foo.onclick = function (){
document.getElementById('content').innerHTML = 'foo';
};
EDIT
The below code works in both Firefox and IE. I've changed the event from foo.onClick to foo.onclick. Make sure your javascript block is at the end of the page or the call to getElementById will return null. Also, you should close the unclosed <img> tag and remove the style="clear: both" from the second to last closing </div> near the bottom of your page.
<html>
<head>
<link rel="Stylesheet" type="text/css" href="apps.css" />
<title>my apps</title>
</head>
<body>
<div id="breaks">
<img src="homeicon.png" />
<br /><br /><br /><br /><br />
<div id="appTable" style="float: left">
<table border="1" id="appTable">
<tr><td>life calculator</td></tr>
<tr><td>punny!</td></tr>
<tr><td>drink roulette (on its way!)</td></tr>
</table>
</div>
<div id="arrowTable" style="float: left">
<table border="1">
<tr><td id="lifeCalculatorButton"><img src="arrow1.png" width="45"/></td></tr>
<tr><td id="punnyButton"><img src="arrow1.png" width="45"/></td></tr>
<tr><td id="drinkRouletteButton"><img src="arrow1.png" width="45"/></td></tr>
</table>
</div>
<div id="content">
my apps :)
</div>
</body>
</html>
<script type="text/javascript">
var foo = document.getElementById('lifeCalculatorButton')
foo.onclick = function (){
document.getElementById('content').innerHTML = 'foo';
};
</script>
EDIT
If you are using an external javascript file you must use the window.onload event handler to register your handler to ensure the page has completely loaded.
window.onload = function () {
var foo = document.getElementById('lifeCalculatorButton')
foo.onclick = function (){
document.getElementById('content').innerHTML = 'foo';
};
};

First, you seem to have a typo here:
<td id="lifeCalculatorButton"><img src="arrow1.png" width="45"</td>
The <img> tag is not closed properly.
You also have to either move the <script> include at the bottom of your document or attach to the window load event to make sure that your script is executed after the elements in question appear in the DOM:
window.onload = function () {
var foo = document.getElementById("lifeCalculatorButton");
// ...
};

It may be overkill but this could be a good excuse to introduce yourself to jQuery or similar framework. It makes this kind of work trivial to implement. See this fiddle for a working examlpe using jQuery.
If you don't want to use jQuery your javascript looks ok as this fiddle works.
As others have said make sure you are not assigning the event handler until after the DOM is loaded. This is done in the pure javascript fiddle above using the following code
<script type='text/javascript'>//<![CDATA[
window.onload=function(){
var foo = document.getElementById('Clickable');
foo.onclick = function (){
alert("See It Works");
};
}//]]>
On a side note following a comment above, the cursor will not change on hover as the browser is still interpreting the element as what ever it is, in this case, a table cell. The only difference is that it now has an event assigned to it. To have the cursor change you will need to do this using CSS.

Does it need to be the td that holds the id? Why not use an a tag to wrap around the image (and as suggested close the img tag correctly with />). Apply the onclick to the a tag and call a function with a return false afterwords to bypass normal behavior... and obviously, in your onclick you can call whatever function u want