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Make the <a> tag open two URLs (in two different pages)

I wanted to make the tag open two URLs at the same time. This is what I tried:
Only HTML
text
This did work but not the way I wanted it to. It would open the URL2 when clicked on it and if opened in a new tab with right click or the mouse wheel it would open URL1. I want it to open both pages in new tabs at the same time.
HTML + JavaScript
HTML:
<a id="myId">text</a>
JS:
myId.onclick = function(){
open('https://www.example1.com');
location.href = ('https://www.example2.com');
}
This didn't work at all.

This is Your code :
myId.onclick = function(){
open('https://www.example1.com');
location.href = ('https://www.example2.com',,'_blank');
}
Change the code to:
myId.onclick = function(){
window.open('https://www.example1.com','_blank'); //just use window.open() for both the cases;
window.open('https://www.example2.com','_blank');
}
Hope, you have got the solution for your problem.

As per your requirement, I would suggest following.
Also look at the fiddle HERE
Open Two URLs
var myId = document.getElementById("myId");
myId.onclick=function(){
window.open("https://www.google.com","_blank");
window.open("https://www.microsoft.com","_blank");
}
You should be allowing your browser's POPUP BLOCKER to allow opening multiple pages/tabs for this to work.

Try using an onclick function that uses window.open to open the two URLs:
document.querySelector("#foo").onclick = function () {
window.open("https://www.example.com", "_blank");
window.open("https://www.example.com", "_blank");
};
<a id="foo">bar</a>

How to set the title for the new browser tab?

I have a question about the new tab for the link.
Is there anyway I can set the browser tab title before user clicks a link? It seems like there is no way to debate the title for the new tab if the html contained in the new tab doesn't have title attribute. Am I right? How do I set the title?
//the href is dynamic so I can't set them one by one because I have 100+ html file here
<a href="test.html" target="_blank">open me<a>

As you have it, this is not possible because your links are just normal HTML links. When the new page opens in a new tab, the current page will not have any reference to it and so cannot change it in any way. You will need to open the page using javascript and set the title that way.
You can dynamically set this up in window onload to find all a tags and add a click event whihc opens the window and sets the title.
If you want different titles for each page, you can store this in a data- attribute in the a tag.
Note tho that this will only work with pages in the same domain (for security), and that it does not handle people right clicking and pressing "Open in New Window". Middle click in Windows does seem to work however.
HTML
open me
JavaScript
window.addEventListener("load", function() {
// does the actual opening
function openWindow(event) {
event = event || window.event;
// find the url and title to set
var href = this.getAttribute("href");
var newTitle = this.getAttribute("data-title");
// or if you work the title out some other way...
// var newTitle = "Some constant string";
// open the window
var newWin = window.open(href, "_blank");
// add a load listener to the window so that the title gets changed on page load
newWin.addEventListener("load", function() {
newWin.document.title = newTitle;
});
// stop the default `a` link or you will get 2 new windows!
event.returnValue = false;
}
// find all a tags opening in a new window
var links = document.querySelectorAll("a[target=_blank][data-title]");
// or this if you don't want to store custom titles with each link
//var links = document.querySelectorAll("a[target=_blank]");
// add a click event for each so we can do our own thing
for(var i = 0; i < links.length; i++) {
links[i].addEventListener("click", openWindow.bind(links[i]));
}
});
Sample JsFiddle

You can pass the title with hash and get it on another page, if this another page is yours and you can modify its code.
1st page:
...
<a href="test.html#the_title_you_want" target="_blank">open me<a>
...
2nd page - modify the body opening tag like this:
<body onload="document.title=window.location.hash.replace('#','');">
If the page you are linking to isn't yours, you can use window.open method:
open me

I have not seen addEventListener work reliably, especially when opening a new page using javascript. The best way to change the tab title and have it work reliably is to set a timeout until the page loads. You may have to play with the timeout value, but it works.
var newWindow = window.open(url, '_blank');
setTimeout(function () {
newWindow.document.title = "My Tab Name";
}, 100);

You have two options. Using pure HTML, you can let the user open up links, then later on change the title. Or you can change the title with inline JavaScript. Here's how you do both:
Method 1
Change your links by assigning a target attribute, and then later on use that window name to control the document. For instance in your links it would be: <a href="whatever" target="theNewWindow">. Whenever you want to change the title for this page, you'd use JavaScript as such: window.open("", "theNewWindow").document.title = "New Page Title!"; The problem with this method however is that all links with that target/window name will open in that same window. In addition, after the first time the link is clicked, your browser won't automatically switch to the new tab/window.
Method 2
Change your links by assigning an onclick attribute, which would open the link manually and change the title of the page immediately. Basically it would come down to look like: <a href="whatever" onclick="var w=window.open(this.href, '_blank'); (w.onload=function(){w.document.title='New Page Title!';})(); return false;">. This opens the window based on the href attribute, immediately changes the title, and sets the window to change the title to that when it finishes loading (just in case there really was a title tag).
The problem with both of these methods (as mentioned by others) is your html files have to be on the same domain.

The simplest way is a follows:
var winTab = window.open("", "_blank")
//Open URL by writing iframe with given URL
winTab.document.write("write iframe with your url in src here")
//Set Title for the new tab
winTab.document.title = "Form Title"

You could make your own Page 2 that opens up the other pages (the ones you can't edit), in a frameset. You can then either change the title dynamically when loading your page 2, or as others have suggested if you use window.open you can control the title from the parent page.

If you are in page 1, and opening page 2 in a new tab, you can't set title for page 2 from page 1.
If you have access to page 2 then it's possible, otherwise not.

JavaScript to open two web pages using one link

I need JavaScript code or HTML to make two websites open in two new browser tabs when clicking on one link. I do not want them to open in new windows, or on the current page that the link is on.

It probably won't work because the browser might consider it a popup and block it.
If the user allows popups you can do:
window.open(url, '_blank');
Like:
<a id="mydoublelink" href="http://site1.com" target="_blank">foo</a>
document.getElementById("mydoublelink").onclick=function(){
window.open('http://site2.com', '_blank');
}

If you call window.open in the onclick event you should be fine. Built-in popup blockers allow those. The kind of popups that get blocked come from other events or from scheduled events like a setTimeout.
document.getElement("my_link").onclick = function () {
window.open(/*..*/); // works
}
document.getElement("my_link").onclick = function () {
setTimeout(function () {
window.open(/*..*/); // will probably get blocked
});
}
This means, for instance, that if you open a popup after an AJAX call it will very likely get blocked. A workaround in this case is to open the popup right away and fill in the content later. This is outside the scope of this question but I feel like this is information that everyone should know.

Something like this?
<!DOCTYPE html>
<html>
<head>
<script>
function open_win()
{
window.open("URL");
open_win_two();
}
function open_win_two()
{
window.open("URL");
}
</script>
</head>
<body>
<a onclick="open_win()">luyfl</a>
</body>
</html>

Yu can try the new target _newtab:
blabla
It works in Firefox, don't know if it's supported in other browsers.

Printing a web page using just url and without opening new window?

<html>
<head>
<script type="text/javascript">
var URL = "http://localhost:8000/foobar/";
var W = window.open(URL); **Note1**
W.window.print();
</script>
</head>
<p> Print ME...............</p>
</html>
I am using this script to print a webpage.
My views render this page and The JS take care all other things.
But I dont want to open new window for that. So, What should I use instead of window.open(URL) so no new window opens. Similarly, I don't want to open new window for print function.So, Whenever I render this page it do all stuff on the same page. No new window, No new tab. How can I achieve this. I google but nothing seems working.

You can do this using a hidden iFrame (I'm using jquery for the example):
function loadOtherPage() {
$("<iframe>") // create a new iframe element
.hide() // make it invisible
.attr("src", "/url/to/page/to/print") // point the iframe to the page you want to print
.appendTo("body"); // add iframe to the DOM to cause it to load the page
}
This will load the page you want to print. To print, you can add javascript code to the print page so that it gets printed after loading:
$(document).ready(function () {
window.print();
});
This will print the page without showing a new window. I've tested this in IE8,9 and Google Chrome, so I'm not sure if this works for Safari or Firefox, though.

There's a nice example on MDN how to do that with a hidden iframe https://developer.mozilla.org/en-US/docs/Printing#Print_an_external_page_without_opening_it

In reference to #andragon's answer. updated on top of it.
You can do this using an iFrame(Not hidden because hidden iFrame prints the blank page in latest versions of browsers. You can hide after the print is triggered)
function loadOtherPage(link) {
$("<iframe class='printpage'>") // create a new iframe element
.attr("src", link) // point the iframe to the page link you want to print
.appendTo("body");
}
This will load the page link you want to print.
On loading the print page link you can call javascript.
$(document).ready(function () {
window.print();
});
window.onafterprint = function () {
$('.printpage', window.parent.document).hide();
}
This will print the page from the same window and onafterprint Event is triggered when a page has started printing, or if the print dialog box has been closed
window.parent.document is to hide the iFrame block on the parent page.

I'm using Asp .net core with razor html as view, in this case I have used window.print() to print the page then used window.onafterprint to back to the page where used want to be redirected.
You can use ViewBag to replace the "/NewSales" URL.
NOTE: window.onafterprint will be called whenever user clicks Cancel/Submit/Print button in that pop-up.
$(document).ready(function () {
window.print();
window.onafterprint = function () {
window.location.href = "/NewSales";
}
});

function CallPrint() {
var prtContent = document.getElementById('main');
var WinPrint = window.open('', '', 'width=800,height=650,scrollbars=1,menuBar=1');
var str = prtContent.innerHTML;
WinPrint.document.write(str);
WinPrint.document.close();
WinPrint.focus();
}
Call this javascript function on Print button click."main" is the id of the div which we have to print without opening into new window.I want to notify that this will print the current page div.
Try and rever in case of any issue.
Thanks,
Gourav

Detaching/opening an iframe into a new window

I have an iframe setup within a page and basically want to know whether it's possible to have a button in this iframe and when pressed, opens the iframe into a new browser window, showing the contents of the iframe.
I am planning on using either JavaScript or jQuery to achieve this. I am using IE6.

$('.button').click( function(){
window.open($('iframe').attr('src'),'mywindow','width=400,height=200');
});

For what you need (to open the same page where this button), no matter if it's an iframe or if in the home page.
The only difference is if you want that data to open in new window, are a reflection of the same page, such as data that can be an input.
If you care about who are the same data:
$("#mybuttonOpenWin").click(function(){
window.open(window.location.href);
});
If you are interested, you can try this code:
$("#mybuttonOpenWin").click(function(){
var mref = window.open(window.location.href);
(function = onReadyRef(xref){
if(xref.window.document.readyState=="complete"){
$(xref.window.document).find("body").html($("body").html());
}
else{
onReadyRef.call(this, xref);
}
})(mref);
});