I need to automatically refresh a div in JSP (call database).
My database is updated every second (GPS data).
You can either refresh the whole page (See Refresh a page using javascript or html) or, better, use Ajax call to the server and just update the needed div.
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I tried to change inner content of my web page by using ajax but it revert back when I refresh the page, how can I prevent that? I am working on PHP and JS.
You need to keep track of all modifications made via ajax and apply them on the server when the page is generated next time.
I was wondering, is Ajax only for dynamic content update or can it also, say, create a few buttons in a given div depending on what action a user chooses in another div? For example, if the login page and first page look very similar by only a few buttons, once proper login credentials are entered, can I use Ajax to make the other three buttons appear once logged in properly, rather than going to a whole another web page that has those buttons hard coded in the html/css? If this is possible, I'll take pointers to any tutorials. Thanks.
AJAX is just for creating HTTP requests using javascript, in order to prevent full page requests.
What you can do is to process the login request using AJAX and then, depending on the response you send, to display an error or update the DOM with the logged in interface.
If you just want to change the DOM, you use javascript directly (jquery would help) but no AJAX is needed.
Is there a way in web2py for SQLFRORM.grid pagination to not refresh the whole page without the use of the LOAD function?
In general, refreshing something on the page with data from the server without reloading the whole page will require an Ajax call (or websockets, or an iframe). The easiest way to do that in web2py is probably to use the LOAD() helper, though you could set up the Ajax manually as well.
I have a jsp page which shows the data of a queue.I want the new data to be displayed automatically whenever it come to the queue,dont have to reload the page again.
Is this possible by ajax?any example how to do or tutorials..
Thanks,
i have a form that it send data with ajax post metod. when i set flashmessenger in action method, it don`t show any messege (i have to refresh the page for see the messege)!
how i can manage the flashmessenger for recognition ajax load page??
Flashmessenger uses sessions, in order for it to work you need to physically reload the page. You have to create your own mechanism; Whenever you get the callback you can append lets say your response to the same element in which you would have displayed the flashmessanger message.