Develop Reference

Make the button open a specific tab in chrome

Is there any way to change the script in page so i can make a button go to a specific page? Like, using inspect element? I want the open a page and add a script in the button of this page, so it can go to the url i add.

only if you have created that target tab. then you can send a message with anything and use eval in document in target tab

I want to create a function like onbeforeunload for the submit of my page

In my site I have many href and button that relocate the page you are in. I thought that, since you can't modify the body of the alert created with onbeforeunload, I can make my own type but my questions are:
Can I intercept when the page is relocated inside my site without onBeforeUnload or onUnload?
Can I make a function wait until a button i pressed?
Is it possible to intercept some other changes of the browser page like if the user try to close it?
Is it possible to disable the entire page and leave only a toast be available?

How do I after button click which opens a webpage, pop an alert in javascript

I have a contact form which when the button to submit is clicked redirects to my homepage, when my homepage loads I want a javascript alert to come up saying 'Thanks for contacting us'
Thank you.

Attach a parameter to your URL (www.example.com/?formSubmit=true).
With JS, look for the formSubmit=true. If you see it, create an alert.
To set up the javascript portion, check out this previous question:
How to retrieve GET parameters from javascript?

jQuery .unload() function issue, activating only when a specific link is clicked

I'm building a site using bootstrap and have created a navbar with some links. The index page consists of the navbar and a body with a single div that pulls in content (pages I've created) via jQuery's ajax feature (depending on what link was clicked in the navbar, that page is displayed in the div).
The site is for users who have permission to access pages based on folder settings I've created (if a user has access to a folder, he can view the pages within it). It works fine for the most part, but when a user who does not have access to a page clicks on a link, I assumed that the error page would show up in the div. However, it just bounces the user off the site completely to an error page.
My solution is to use a jQuery unload event.
I placed this in a .js file:
$( window ).unload(function() {
alert( "Bye now!" );
});
But a popup now shows up when I click on any external link, when I close the browser, or when I refresh the page. I only want it to activate when a user clicks on a specific link (one with an id class). I want to let them know that they clicked on a link that they do not have access to, and if they do not stay on the page they will be forwarded to an error page. How would I go about doing this?
--Update--
Here is the JSFiddle Link to JSFiddle
So for example, all users have access to the page "technology", so when they click that link on the navbar it is fetched and displayed in the div id "result". However, only some users have access to the page "inspections"; for those who have access the page is fetched, for those without it redirects them from my page to an external error page. I want a warning to pop up so they know that they don't have access and if they follow the link they opened that they will end up on an error page.
--Update 2--
Using Mr. Genuis' code got it working, but I have one final question. I implemented the code and a pop up appears for users who don't have access to the link (exactly what I wanted to happen), but when they click the OK button or click the x button on the popup, they are still forwarded to the error page.
Is there anyway to disable that? I tried updating the unload function (that Mr. Genuis provided) with this code, and it works (it gives the user an option to stay on current page which prevents the error page from loading), but the pop up function also activates when a user tries to close the browser page. I just want it to trigger when the link is clicked.
Here is the code i used:
$(window).bind('beforeunload', function(){ return '>>>>>Before You Go<<<<<<<< \n Your custom message go here'; })

I am really not sure if your approach is right for the given problem.
About activating the window unload event conditionally,
move that unload event hookup inside the link click event, that way you hookup the window unload event only when needed. Not always!
Update:
Something like below. For illustration purpose only.
Warning: I feel there is a smell in this approach.
$(".link").click(function(){
if(true){//Your condition check goes here.
$( window ).unload(function() {
alert( "Bye now!" );
});
}
else{
window.location.href = "someurl";
}
});

Redirect after clicking an external link and only open one tab/window

I have created a jsp for external clients of my application to use to link to the web client. They can specify which client they are in the URL so that when the link opens a window it is named and any other links from that client will open in the same window. Here's an example URL:
mysite.com/redirect.jsp?fromClient=mine&page=awesome
The problem is that when you click on this link, for example from an email digest, it opens the redirect.jsp page which uses window.open() to open the desired page. From the above link, the page that would open would be:
mysite.com/index.jsp?page=awesome
So then I have two pages open, when really I only want one. And since I'm not using javascript to open the first page (it's a link), I can't use window.close() to close it. I've tried working around using window.open('','_parent','') and window.open('','_self','') but neither works.
I know there has to be a better way to redirect than to open a second window from my jsp page, but I don't know what that better way is. Thoughts?
EDIT
Primary goal is for users of external clients to be able to click links in that client and have all the links take them to the same window/tab in a browser. I'm using window.open right now because I can parse the link and get the client name and then supply that in the window.open function.
EDIT 2
I always end up being too vague in these questions. Ok, here's the setup:
An email digest contains a link that looks like
mysite.com/redirect.jsp?fromClient=emailDigest&pageNum=4
Currently, when that link is clicked on, it opens a browser (duh) and then the redirect.jsp page parses that link to get the client name, in this case emailDigest. It then calls window.open('mysite.com/index.jsp?pageNum=4','emailDigest'). This creates a new window with the name emailDigest unless a window/tab with that name already exists, in which case it merely updates the URL in that window with the new one.
I want to either be able to close the original window (the one with the redirect.jsp address) or not have to open that initial window at all.
NOTE
As there are many different clients that want to be able to do this, I cannot guarantee that they will be creating the link with HTML so the target attribute is not the answer.

The correct answer is "No, it cannot be done". If you do not open a window with Javascript then you cannot close it with Javascript. I would always have to create at least 2 windows, which is not what we wanted.

I think you're looking for window.location instead of window.open.

Please use window.location.replace("http://mysite.com/index.jsp?page=awesome");
Reason :
replace(url):Replace the current document with the one at the provided
URL. The difference from the assign() method is that after using
replace() the current page will not be saved in session history,
meaning the user won't be able to use the Back button to navigate to
it.

As haynar says above, why do you open a window and not either:
<!-- content contains the refresh delay in seconds and the target url -->
<meta http-equiv="Refresh" content="1; URL="http://mysite.com/index.jsp?page=awesome">
or use javascript to do the same:
window.location.href = "http://mysite.com/index.jsp?page=awesome";
either works fine and will leave you with one window open.
To get the named window use a targeted link:
Mysite.com
This will automatically set the name property of the opened window.