Verify That The Data In My Form In HTML Is Already Exist In My Database
Nov 23, 2011
I want to verify that the data in my form in HTML is already exist in my database if this is true then the form must not be sent. I know this is done in javascript but I can not found the right solution. I would like an illustrative example.
I would like to use jQuery to prepopulate a form - ie make a call to a php program to get data from a database and pre-populatea form with appropriate data for the user. Can anyone point me in the right direction for some examples on the simplest way to do this?
I managed to send data from the form using php & jquery/ajax. But now I need to be able to load that data back onto the form. Is it somehow possible to use the code I have for sending the data to retrieve the data?
I want to build-up ajax based friends system. though i no nothing about ajax (would like to learn but) actually i have form where user can add his friend. on very next page of this page he/she can see what he/she is entered and where
they should probably see the add and remove button(which i want to build up using ajax)
how to start for this? till now i have code where user can write his friend name and to the next page he/she can see the value he has written. on submit button it all goes in to database. means i have devloped php form for this.
I'm trying to expand on a tutorial where Jonathan Stark creates a database using JS, CSS, and JQuery. A complete explanation of the code can be found in chapters 4 and 5 here:Building Android Apps with HTML, CSS, and JavaScript (sets up the HTML).Building Android Apps with HTML, CSS, and JavaScript (sets up the DB storage).Stark uses a form for the user to enter data, then the attached js file inserts the data into the SQLite database:
how can I redirect the form to a different database script on a different or same page as this database code? I want to have multiple forms going to different tables, and I want the database scripts kept separate. I just don't understand how the form data knows to be inserted into this database. If I duplicate kilo.js, rename it kilo2.js and use different field names, and attach it to the forms page following kilo.js, then kilo.js is ignored and the original form does not work.
I have an ajax function which passes form field values to a PHP script which in turn saves the data to my database. all works great.
I now need to add a file input to my form and pass the file upload ot the same PHP script.
I have read an article [url] which explains how to do this but this would suggest it is a completely separate function.
My question is, is there anyway I can expand my existing function (below) to inlude the file upload process to save having 2 functions doing the same process?
I was wondering if there was an easy way to dump the html that gets generated after the page gets loaded to verify it's what I wanted and expected (I'd like to check out the source, not just the results).
I use the following to verify that a user has entered a number between 0 and 99 in a form:
It seems to work fine in all browser / machine combos except Firefox on a Mac, when entering 0 returns false (I don't know if entering other numbers also returns false.)
I have a database search web application in which the user is presented with a search page. The search page has a number of values by the body onload method.
My problem lies when the user selects search. The user is taken to the results page but when the user returns to the search page he or she is presented with a blank search page with default values set.
What i need is for the form to hold the users input until the user selects a clear button.
The following Javascript will return an error message if the user did not enter any value into the zip code field. The form will submit even if user entered only 1 character. Does anyone know how to change this to at least minimum 5 characters must be entered into the field?
...} var fname = "CustomFields_17_2"; var fld = document.getElementById(fname);
is there a way of sending data inputted into a form inside a chunk, to an ASP form on a completely external page (i.e on a different, unrelated site)?This is the code I have for the form chunk:
Very new to JavaScript so I'm sorry if this is a daft question, I have searched for answers first and could not find anything that works for me ... so .. One html form with two submit buttons. On submit (save changes) posts back to the same page and updates a database. The other submit button (preview) should open a op-up showing what the data would look like if the user should press save.
I am attempting to create an Access database connection from within an HTML page. I am using Javascript to make the connection and then test a basic UPDATE statement.
The following code is throwing back an error 'UPDATE statment syntax incorrect'
Code:
I thought the syntax was correct, but maybe it is something else?
I am developing a web application in java (jsp's and servlets). For the project I am working on I will need to develop an html data entry screen and the code to load data into the screen, and then save the data back to the back-end database.
How to do the following: Read the data out of the database (JDBC, no problem) in a servlet. Put the data into the appropriate form for returning to the data entry screen, which will be a jsp. (Is JSON the right choice for passing the data from the servlet to the jsp?)
In the jsp, parse the returned data and populate the HTML form elements (text fields and combo boxes). When a button is clicked, pull the data out of the form elements and return to a servlet for saving back in the database.
I have a html form which produces 3 post varaibles.
I'd link to be able to call a php file when sumbitted that sends the data from my form and returns the results from my php file to a div on the oringal page.
I know that you can use .load to call a page to be diaplayed within a div $('#container').load('url #div_on_page') but dont know how to send the from data.
I would like to create a html E-test form run on PC and the data will save into a file on disk. I search online for this function code but found that most the script only save the cookie, is it possible for javascript save form data to file? Here is the ideal for my survay form,
1. user click "start" button for the e-test,
2. user need to finish the e-test with in 20 minutes, after 20 minutes the form will auto submit and the data will save into file,
3. me will go to the file folder open it and print out the qestion and anwser.
4. The file will be detele after i print out and the next user can do the e-test again.
I got the time counter and the auto submit script. but i just have no ideal how to save the data into file.
I am having no luck with my post form to mysql. It is only posting the first letter of the word/phrase for the text input fields to the mysql database. It is a photo and text post form. The photo and only first letter of text are posting to database. I am using Jqtouch, jquery, and phonegap.
I am looking for a solutions for the following problem, I need to access at database from within a website, from where I can retrive a specific document in the database and mailing it to someone else. Of course I cut crab the document from the database and save it on my harddrive, and then send it. But this process don't fit into our busy days.