Develop Reference

Is there a way to change HTML content of a <p> element from within a Javascript function?

I want to change the HTML content of my webpage from within a javascript function. My HTML looks like this:
<div class="chartInfo">
<p id="last_updated">Hello</p>
</div>
My Javascript function is a QueryResponse to a GoogleCharts query. It looks like this:
<script type="text/javascript">
google.charts.load('current', {'packages':['corechart']});
function function_1() {
var queryString = encodeURIComponent('SELECT AA, AB');
var query = new google.visualization.Query('https://docs.google.com/spreadsheets/d/1dXP9yGEzNlmRxwCr2kyMM9CcS5hloIxKvef0RSa10/gviz/tq?gid=559927965&headers=1&tq=' + queryString);
query.send(function_2);
};
function function_2(response) {
if (response.isError()) {
alert('Error in query: ' + response.getMessage() + ' ' + response.getDetailedMessage());
return;
};
var data = response.getDataTable();
var t = (data.getvalue(0,0));
var latest_time = t.getDate()
document.getElementById("last_updated").innerHTML = "Last updated: " + latest_time;
};
</script>
Currently the webpage is showing "Hello" rather than "Last Updated: " + latest_time as I want it to.
I think it may be a problem of scope - when I write scripts out underneath I can change it from "Hello" to another string using document.getElementById, but then I can't access the variable latest_time which is within function_2.
Thanks in advance for any help!

Change dom.innerHTML to dom.textContent for changing text of it

add javascript variable to url

In short, I want to pass the site url of the user which uses the following code:
<script type='text/javascript'>
var url = document.location.href;
</script>
<iframe src="http://localhost/page.php?site=242333&u=" + url + " scrolling="no" frameborder="no" style="border:none; overflow:hidden;" onload="this.width = this.contentDocument.body.scrollWidth; this.height = this.contentDocument.body.scrollHeight" />
The problem in the following part:
src="http://localhost/page.php?site=242333&u= [" + url + "]
How can I concatenate the JavaScript variable with the url?

you cannot use javascript variable in html code. Just fill the src attr of tag with javascript like for example:
<iframe id="frame" src=""> ... //rest of html
<script type='text/javascript'>
var url = document.location.href;
document.getElementById("frame").src = "http://localhost/page.php?site=242333&u=" + url + ... //rest of src
</script>

HTML
<iframe src="http://localhost/page.php?site=242333&u=" id="iframe"></iframe>
JavaScript (jQuery)
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<script type='text/javascript'>
var url = document.location.href, getIframe = $("#iframe").attr("src");
$("#iframe").attr("src", getIframe + encodeURIComponent(url));
</script>

You can't use a JavaScript variable in your HTML markup like you're trying to do. It just doesn't work. What you can do is set the frame's source in a script that comes right after the iframe in your HTML. So, something like:
<iframe scrolling="no" frameborder="no" style="border:none; overflow:hidden;" onload="this.width = this.contentDocument.body.scrollWidth; this.height = this.contentDocument.body.scrollHeight" id="pageFrame"/>
<script type='text/javascript'>
window.addEventListener('load', function() {
var url = document.location.href;
document.getElementById("pageFrame").src =
"http://localhost/page.php?site=242333&u=" + encodeURIComponent(url);
}
</script>
Note that I added an ID to your iframe so that it could be accessed through document.getElementById() Also, I used the JavaScript encodeURIComponent so that the string in your url variable would be safely encoded for your source URL. This will require a corresponding decode on the server side, and since it looks like you're using PHP, that would be done using the urldecode() function.

Get url query string and use as src on iframe

I'm completely new at javascript and I'm wondering about something really elementary here. I've got an iFrame that I want a dynamic src on. This src(source) should just be a variable. And then a script sets that variable before the frame is loaded.
It's actually a webpart in Sharepoint 2010, so I set up the webpart and edit it's HTML source to something like this:
<script language="JavaScript">
var qs = getQueryStrings();
var myParam = qs["myParam"];
function getQueryStrings() {
var assoc = {};
var decode = function (s) { return decodeURIComponent(s.replace(/\+/g, " ")); };
var queryString = location.search.substring(1);
var keyValues = queryString.split('&');
for(var i in keyValues) {
var key = keyValues[i].split('=');
if (key.length > 1) {
assoc[decode(key[0])] = decode(key[1]);
}
}
return assoc;
} </script>
<iframe height="500" src="(myParam);" width="800"></iframe>
I'm not even sure the syntax is correct. Basically, I want to insert the variable into the src of the iframe.

you have to give some class or ID to your Iframe.
And then you can call a function which will give src to i frame dyanmically.
from client side use this:
$('#ID_of_Iframe').attr('src','NEW SRC hERE');
Example: $('#ID_of_Iframe').attr('src','www.google.com');

Make your links like this:
File1.PDF
or:
<iframe name='myPdfFrameName'></iframe>
File1.PDF
function loadFrame(href) {
window.frames['myPdfFrameName'].location = href;
return false;
}
EDIT: Easiest is probably using target attribute of a link:
<a href='file1.pdf' target='myPdfFrameName'>File1.pdf</a>

Capture incoming URL Parameters, then pass to iFrame Src with Javascript

So trying to figure out how to do this with window.location in Javascript. I'm sending users to our site with an appended URL with a Google Analytics code that I need to pass to an iframe src on that page. I'd assume Javascript could do this (note - I cannot use PHP)...
This is what I want to do:
I'd send users to the page with all the campaign data in tact. For example a user would click on this link:
http://www.xyz.com/index.html?utm_source=Facebook&utm_campaign=Facebook+May&utm_medium=click
They would be directed to that page, that then has this iFrame on it. The code on the store side would need to pick up utm_source, utm_campaign, utm_medium and include these parts in the IFRAME SRC So this bit:
<iframe height="960px" frameborder="0" scrolling="no" width="958px" src="http://www.abc.com/minis"></iframe>
now becomes:
<iframe height="960px" frameborder="0" scrolling="no" width="958px" src="http://www.abc.com/minis?utm_source=Facebook&utm_campaign=Facebook+May&utm_medium=click"></iframe>
Any javascript suggestions would be greatly appreciated. Note - I cannot use PHP.
UPDATE:
Got this to work!! Yay, but now I need to edit it a bit:
So say the appended url that was clciked was this:
http://abc.com/index.html?apple&orange&peach
and I need the iframe src to be this
http://xyz.com/minis?orange&peach
I moved a few things around in the script, but is now only grabbing orange and not the other & attribute (peach). please advise if there is a better way to work (without have all the params and then depending on what link comes in, some of the & will be undefined:
<body>
<script type="text/javascript">
$(function() {
var loc = window.location.toString(),
params = loc.split('&')[1],
params2 = loc.split('&')[2],
params3 = loc.split('&')[3],
params4 = loc.split('&')[4],
params5 = loc.split('&')[5],
params6 = loc.split('&')[6],
iframe = document.getElementById('myIframe');
alert(iframe.src);
iframe.src = iframe.src + '?' + params + '&' + params2 + '&' + params3 + '&' + params4+ '&' + params5;
alert(iframe.src);
});
</script>
<iframe id="myIframe" src="http://www.xyz.com/minis"></iframe>
</body>

This little snippet should do, here all you have to do is grab the bit after ? as a string and append it to the iframe source.
var loc = window.location.toString(),
params = loc.split('?')[1],
iframe = document.getElementById('myIframe');
iframe.src = iframe.src + '?' + params;​​​​​​​​​​​​​​​​

Just use window.location.search.
const iframe = document.getElementById('frame');
iframe.src = iframe.src + window.location.search;​​​​​​​​​​​​​​​​

Passing javascript variable from iframe to URL

Lets say I have a function like this:
<script type="text/javascript">
function ReturnURL()
{
var url = document.URL;
var url2 = url.split("=");
var urlID = url2[url2.length-1];
//window.open('http://localhost/POSkill/skillshow.aspx?user_id =' + urlID);
return urlID;
}
</script>
And I also have iframe in my html file which is something like below:
<iframe id="showSkill" scrolling="yes" src="http://localhost/POSkill/skillshow.aspx?user_id = ReturnURL()" height="350" runat="server" ></iframe>
Now all I want to do is to send the urlID value of javasrcipt as the user_id value in iframe. I have tried by using user_id = ReturnURL() but its not working.
How can I do this?
Thanks in Advance.

I answered something very similar at enter link description here
The answer is that you must set the "src" value on the JS rendering.
This means that somewhere in your javascript you should have the following code
...
document.getElementById("showSkill").src="http://localhost/POSkill/skillshow.aspx?user_id =" + ReturnURL()
...
This should work just fine.