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I want to add content from my website to the html permanently

I want to build a website in which users can add information, like craigslist. I want the website user to be able to click a button fill out a form and add another box. For instance, if there is a three by three grid and the user clicks on the add button, I want a form to appear, them to fill it out and one more box to be permanently added to the grid. Of course I could make it happen with Javascript and JQuery but it isn't permanent. Thanks:)

You can Implement this using server side languages like PHP /Node JS, ASP.net, Java, Ruby or you can use Local Storage of the browser (this gives limited storage capacity ). read this for more details. link

If you don't already know PHP, you will need to learn it for this. Also, you will need to make sure that you understand how to validate input because letting users add to your database can be a very dangerous thing to do if you don't understand how things like script injection works.

Save the state of page. Cookie or session?

I have a little web app (which only has 1 page) that allows user to input and select some options. The input texts and selections will be displayed in another div in the form of table. You may want to refer to the example here: http://jsfiddle.net/xaKXM/5/
In this fiddle, you can type anything and after you clicked submit it will get the text input and append them to another table #configtableTable
$('#labels #labelTable tr:last').after(addmore);
$('#configtable #configtableTable tr:last').after(displaymore);
I'm using cherrypy as a mini web server (and thus major codes are written in python) and i know that it has session here but i have no idea how to use it at all as the example given is not really what i want to see.
FYI, i'm not using PHP at all and everything is in a single page. i simply show and hide them. But I want the page to remain as showing #configtableTable and hiding #labelTable even after refresh. Note that the fiddle is just part of the web app which will only show all these after getting a reply from another device.
Not sure about cookie because all the links i've found seem broken. How about jQuery session? Is it applicable in my case? I need some examples of application though :(
okay, to conclude my questions:
1. can i save the page state after refresh? and how? which of the methods mention above is worth trying? is there any examples for me to refer? or any other suggestions?
2. can i simply DISABLE refresh or back after reaching a page?
Thanks everyone in advance :)

Don't disable Refresh and / or back navigation. It's a terrible idea - user's have a certain expectation of what actions those buttons will perform and modifying that leads to a bad user experience.
As for saving state, while you could use session or cookies, if you don't need that data server side, you can save the state on client side as well.
For example, you could use localStorage
Alternatively, you could create an object out of the data in the table, JSON.stringify() it and append it to the url like this: example.com#stateData.
In case of either option, at page load, you'd have to check if there is state data. if you find there is, then use it to recreate the table, instead of displaying the form.
The disadvantage of the first, is that not all browsers support localStorage.
The disadvantage of the second is that URLs have a length limit and so this solution won't necessarily work for you if you're expecting large amounts of data.
EDIT
It appears that Midori does support most HTML5 features including localStorage however, it's turned off by default.. (I'm trying to find a better reference). If you can, just point Midori to html5test to see what HTML5 features it supports.

Make javascript mandatory in web application?

I am building a web application that will have a fair bit of forms. The html forms are generated using php.
One of the things I came across is this:
I have a drop down box for the user to select his country. Once he selects the country, a call is made to the server to fetch a list of states within that country and populate it in a drop down box.
Initially, I thought I could provide 2 options:
An enhanced jquery version where ajax is used to fetch the states and the populate it in a drop down.
Where javascript is not availiable, the whole page is submitted to the server and then rerendered with the new states in the drop down.
However, onChange() requires javascript. So if someone where to visit the form without javascript enabled, there's no way we can deal with the second option, since javascript is required to submit a form using onChange().
What are some ways to deal with this? My only solution at the moment is to just make javascript mandatory. Users without javascript enabled will see a message saying that the page will not work properly.
Some sites:
Hotmail.com - Refuses to show anything except a "javascript is required message"
Facebook.com - Tells us we should use the mobile version of the site.
Google Maps - Does not work. No message to say javascript is required.
Gmail - Falls back to basic html.
Google account - Does not work. No message to say javascript is required.
Is it acceptable to require users to have javascript enabled at the current state of the web (august 2011)?
Just came across this possible solution:
http://cita.disability.uiuc.edu/html-best-practices/auto/onchange.php
I could perhaps add a button which the user can use to select their country. This should allow us to reload and render the form with the states drop down without any javascript.

You can provide a drop-down of states and tell the user to leave it blank if not applicable. If JavaScript is enabled, it can remove the drop-down until a country where it is applicable is selected.
No, it is not acceptable to require JavaScript; many security-conscious users use NoScript, for example, and would prefer not to turn it off.

By default you should load all possible values into the second dropdown, then clear them out on page load with Javascript. That way people without Javascript enabled can still choose the correct option.
I'm guaranteed to take flak for this, but whether you support no-JS or not should be your call. If you think your userbase is likely to have a sizeable portion of people who disable JS, then you should give them a site that works, but not optimally. If you think most of them will be running with "normal" (air quotes are important there) browsers, then you may consider dropping support for no-JS users.

I am NOT a professional developer, so take my input accordingly. Here are my observations:
I support a website for a wedding cake vendor. Upon observing the competition, all the more appealing sites are embellished (tastefully) with slideshows, dropdowns, animations, interactive form validation, etc.
When scouting for methods to incorporate these features into our site, I found that mostly every classy method was based in javascript.
Figuring it was better to present ourselves as the classy act we are (humble smile), I have decided to require users to have javascript enabled. We've been up for 7 years, and I have not received any complaints. All work on mobile devices.

A compromise option is to start with your State drop-down populated with the states of whatever country your business is in, e.g., all US states, with an extra option (preferably at the top of the list) that says "Other, non-[yourcountrynamehere]". Next to the State drop-down have a text input where the user can type the name of their state if it's not in the list. If JavaScript is enabled then on document-ready you can hide the text input and go with your Ajax solution. Without JavaScript the user has a fully functional page that doesn't even need a reload.

What I ended up doing is to add a button beside the drop down that says "select country". Users without javascript will see this button. Upon clicking it, the page will reload with the list of states rendered.
For users without javascript, this button is hidden, and selecting a country will automatically render a new drop down containing the relevant states.

Applying Choices in Fields using View in Lotus Domino Web application

I can't quite figure out a work around for using "Use view dialog for choices" in a web based application.
My Question is how can i convert this settings in my field in the Control Tab then Choices, in choices "Use view dialog for choices" then Use current database and access view and a specific column.
Thanks in advance :)

"Use view dialog for choices" is almost always a way to get around the restrictions on the return value of a formula. For instance, you'd use it when #DbColumn in a choices formula for a listbox or dialog list choices formula would cause an error.
The upshot of that is that there's no "one-shot" workaround for the web. A direct functional replacement would be to open the view in a pop-up window or overlay div, and attach some JavaScript to the view in order to override the default web behaviour and force the return of values to a field on the main document. This approach will work well, but it may require server settings that allow the entire view to be served at once (the maximum lines to display per page will probably be less than you need), and it's subject to breakage if the HTML used to display the view ever changes.
You can use LotusScript or Java in a WebQueryOpen agent to populate a conventional widget (the list of a element) in a Rich Text field, either using PassThru HTML or a "Treat contents as HTML" form. That would involve getting the view, then doing a document-by-document (or category-by-category) run through the view index to get the column values you need. (If you take this approach, use the ColumnValues rather than the document field name to retrieve the values -- the cost of opening the document to read the values is high, and your code will take many times longer to run.)
You can also get the view as need using an AJAX request and a ?ReadViewEntries query, which will return an XML representation of the view. Again, you may have to have the maximum view lines per page limit upped in order to get the amount of data you need. You can get around that, though, by using a "suggest" method that doesn't begin retrieving data until the user enters at least one character into the field.
All of these approaches mean using a separate form for the web. That's easy enough -- you simply create a form with the same alias (or name, if you're not using aliases) as the one you're using for the Notes client. In the list of forms in Designer, you can use the hidewhen tab to hide one from the Notes client and the other from the web. (Note that you can create an additional form for mobile devices the same way if necessary.)
I can't get more specific than this with the information at hand. If this is insufficient to point you in the right direction, then edit your question to be more specific (and post a comment to this reply -- I don't spend a lot of time on SO, but I do spend time on other StackExchange sites, so I'll be notified).

Unfortunately, you have to develop it yourself.
http://www.openntf.org/internal/home.nsf/project.xsp?action=openDocument&name=AJAX%20Name%20Picker
AJAX-based name picker is a good start I guess.

Use jQuery to append star to menu item if the linked page's content has changed since last visit

I would like to create a similar effect to Apple's Safari 4 Beta Top Sites page -
when when you view it and a page's content has changed since you last visited, it displays a blue star in the top right hand corner to notify you.
I would like to do the very same, but only within my website and instead of an image I would like to append a '*' or some other character to the menu item's link.
I'm sure you would use the jQuery Cookie Plugin, but my scripting is not that advanced and I do not know how to dynamically change the cookie's content. Have I explained properly? How would I do it?
Many thanks in advance

Server side:
Read the website f.ex every minute and save the timestamp if changed content.
Save the users' visit timestamp to the page
Ajax:
Check if the websites update timestamp is newer than your visitors' timestamp, if yes make the star class visible, when the user clicks on the link, make the star disappear and update the users timestamp.
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Showing a star or an image or whatever with Jquery is not the big deal here, it's a oneliner, the complex problem is to detect website changes, because minor changes can occur, but the main content could not change. The easiest way to do this would be if the website provides rss, then there's probable that the important new content will be published via rss.

You're asking a very vague question. Have you even attempted this? Please try it first then ask for help along the way.
Also, this is not something you necessarily need jQuery for. You could do it completely on the backend. But it's hard to say which solution is best for you without know anymore details.

I guess I would recommend using php and storing the cached page into a db (in other words the user would have a "fav pages" account) then when the user visits the "fav pages" webpage, you would fetch all the users favorite pages and compare it to what has been stored in the db. But for certain pages (for example if they have a date/time string), it would be very difficult to tell if the change was something the user wants to know about. Probably you would need to create a complex algorithm to decide what change is good change and what change is just certain website features.