Adjusting Code To Use Either Server-side Or Client-side Validation--NOT BOTH?
Sep 11, 2009
I have the following PHP code, which uses server-side validation, which works fine. It the user leaves the text field empty it stores an error in a session array which is outputted on the page where the $_GET['id'] variable came from. I also implemented a snippet of javascript code that just checks to see if the cell is empty and throws up alert box. The problem is that both the javascript code and php error validation are both running when I click submit. The PHP code should be a backup to the javascript code in case the user has javascript turned off. The client-side validation should be the default. Not sure if this change should be made in my PHP Code or Javascript Code.
I am building a client-side and server-side solution and want to use JSON through Ajax in both directions. I have ASP or JavaScript server-side, though Microsoft's support of server side JavaScript seems nil, so I am reluctantly conceeding to use ASP. I'd appreciate suggestions on available solutions to encode/decode JSON on the server-side (ASP or JavaScript). I don't plan to load jQuery server-side so that rules out plug-ins. I'd also like to know what is the latest client-side encode/decode for JSON. Is it built in jQuery or a plug-in? In both server and client, decoding JSON securely is key, so using eval () to decode is out.
I am developing a web form using python cgi which has two list boxes. On selecting a value from the listbox1, the list box 2 should get auto populated with appropriate values (which are taken from the DB). I have written a javascript function to get the selected value from the list box1. But I am struck with passing the values from the javascript to the python function written in server side in which I have written the DB related stuffs.
I want to invoke a Client side javascript function and pass the value of the ID. How can I accomplish this such when a user clicks "Open" he goes to a new window with the same ID.
I tried this but it does not work: On Server side: sSql = "SELECT DISTINCT " + "'Action' = '<center><a href= 'javascript: NewWindow('+cast(ChangeRequest.ChangeRequest_ID as nvarchar)+ CHAR(34)+)'>Open</a></center>',"
On Client side: function NewWindow(myID) { window.open("ChangeRequest.aspx?ID="+myID,"WindowName","width=500,height=600"); } </script>
I have a web form that has a checkbox on it and a textbox associated with it. I want the textbox to be displayed when the checkbox is checked and I want this to happen on the client-side instead of posting back to the server. The checkbox is a server control (asp:checkbox...). I can write some codebehind that will display an alert message upon checking the box that looks something like this...
Page_Load...
Dim s As String Dim scriptString As New System.Text.StringBuilder
chkExpDate.Attributes.Add("onclick", "alertmsg()") scriptString.Append("<script language=JavaScript> function alertmsg() {") scriptString.Append("alert('hi'); }<") scriptstring.Append("/" + "script>" s = scriptstring.ToString()
Page.RegisterStartupScript("startup", s)
End Sub
I used this as a test to make sure the server control was running the script. But, when I change the script to assess the value of the server control checkbox such as checked = true, I get errors and if I just try to display the asp:textbox, it doesn't work either.
I know that Javascript is client side, but I'd like to know the best way to populate HTML drop downs in real time based on information typed in the other HTML form fields with information found on the server as opposed to the client.For instance if a user wants to select certain files located in a directory on the server, as they type in the pathname supposedly containing the files the drop downs continually refresh themselves with the server files listed in that directory (if it exists, and apache has permissions to see what's inside) as if it was showing client files instead.
What would be nice is if my browser could continually query the server for some of its private information and not have to refresh itself to obtain it, whether that means the server-side would have to continually refresh itself makes no difference to me as long as the client-side doesn't have to. But I guess this is not possible because no matter what you would have to at least refresh the client-side page once?Submitting the form to a CGI or PHP script would not work because I need this functionality to help populate the form BEFORE I send it.I would like to not have to press a button to update the form every time I change the pathname and need to update the drop downs since this would be annoying.
I had a import function which allow for user import data from excel file. The number of row was dynamic, mean that user may import hundred or data or may thousand of line.
should i perform client side or server side validate?
the problem i faced was if the import thousand of line, i need display out thousand of text (multiple by 6, cause 1 got 6 fields)
the take a lot of time to loading and cause browser "hang" (response slow)
I have the following client-side Content Management System VBscript which works great, now I'm looking at getting it to work server side so that I can update using online login rather than offline and having to upload files. To be honest, I have no idea where to begin with this,
The only way i can think of doing such a thing is having an active server page that returns an image, that is generated on the fly. As long as there is no caching on the client this in theory will allow the client to perform an action on the server and display an image generated on the fly as a result of this action without actually reloading the page, simply by requesting an image.
what is the difference between client side JavaScript and server side JavaScript? Client side JavaScript is directly embedded in the HTML code...what about serve side scripting?
I have a few values and variables that I want to post to a server (without using a SUBMIT button). Is there a way to post data from within javascript - do sockets or connections have to be open for this to work?
I am developing an ASP.NET (C#) application and need some help. I wish to call a server-side function (in the code-behind "file.aspx.cs") upon a user clicking on the "X" to close the browser window. Is there a way to postback and call a server-side function when this happens? I am aware of the browser's native "onunload" event, but am not certain that what I'm looking for is actually possible.
what I'm trying to do is get the browser to display a warning if the file the user inputs is one of an array of allowed files (which is thoroughly checked server-side), but are wasteful in size (like .bmp .tif .avi .wav). I want them to be able to upload it if they want, but just to notify them they could save space by converting to a smaller format (as they pay per megabyte). So on submit I need to get the file input value, check the extension, and if its allowed but wasteful to display a message with a yes and no button, which would submit if they press yes and not if they press no.
I'm not very experience with javascript but I know a lot about php, but I don't really know what the equivalent functions are.
My login to the site is being processed using ajax, which does a redirect to the members page upon succesfull loggin in.The login feature however can in fact take a while because we need to initialise quite some data when a user logs in (his details, but also his privileges are loaded, his personal menu based on these privileges are being loaded, we are loading shopping cart info, we are initialising personalisation settings, and a whole lot more.It sounds like a big thing, but it isn't, and once logged in, the application is going great. the only thing is that the login proceure can take 3 - 4 seconds, and I would like to be able to show the client the progress of the serverside script:
"Searching your account..." "Validating your privileges" "Initialising your personal menu" blablabla...
To do this, I might just call an ajax call that starts the login procedure, and then issue another ajax call every 1 second or so to update the status based on some session variables I set in the login procedure and that I can serve to the client when th next ajax calls come in, but I would love for this to work a little nicer as in just needing to initialise ONE ajax call which can send back statusupdates from the server...
I am creating the following using an array called $validate
<script Language="JavaScript">
function validateForm(theForm) {
if (!validRequired(theForm.form[company_name],"Company Name",true)) return false; if (!validRequired(theForm.form[contact_name],"Contact Name",true)) return false; if (!validRequired(theForm.form[phone_number],"Phone Number",true)) return false; if (!validRequired(theForm.form[address],"Address",true)) return false; if (!validRequired(theForm.form[city],"City",true)) return false; if (!validRequired(theForm.form[zip],"Zip",true)) return false;
return true; } </script>
Each field in my form is set to: form[field_name]. This is so when they submit I can grab the form array and it has all the fields they submitted. This seems to cause a problem with this javascript. It gives me an error at the first validRequired where form[company_name] is. Does anyone know what the problem could be?
I have a form field that needs to be validated in a hidden Iframe which is driven by Coldfusion. Which is working fine. But the same form field also need do some client side validation as well if Server side (iframe) validation passes.I thought I could create a javascript function, in it call a server side validate and then client side, but without any success. It does not process in the order as expected. Javascript always go first, then the server side validation.I tried to delay the client side with time delay, then server side did process first, but client function could not recognize the parameter passed.here is the function:
Function doValidation(param1,param2,param3,param4) { ....
The code on how to make this page into 2 columns. Right now I have everything in 1 long row of 6...id like to see how to make it 3 and 3 side by side...
how to pass javascript variable values to server side code i used a hidden field and passed he value in it . i do get the value in hidden field but on using request("hdfield") its blank how do i get the value frm javascript
I am making a call to a php file which right at this minute has no validation, all validation is been done by the jquery form plugin. the validation (xss prevention soon to be implemented) in the thanks fails I want to stop the processing of the form i.e. stop the return of success.
I've literally tried everything. Read 26 tutorials, interchanged code, etc. My validation functions all work. My AJAX functions work (tested manually using servlet URL's). The second servlet validates the reCaptcha form that's generated on my webpage. After the form is validated, even if everything's correct, nothing happens upon clicking submit. I even have an alert pop up if with the captcha result, just for middle-layer debugging purposes.
I want to do all of my validation clientside; none serverside. However, going to be tough if I can't get my god damn form to submit. I've been puzzled by this for close to 36 hours straight. I can't see, and I'm going to get some rest and hope that there is some useful insight on my problem when I return.
In my html page i've to show a grid with some data retrieved from an xml file ... i need to this beacuse i've to use online, on a webserver and offline with all files on a usb key, cd, etc ...
which is the best way to accomplish this?
I suppose a solution it could be via javascript:
-locally open the xml file that contains the data e then render then grid. Now i wornder about the best way to do this ... i've read about xsl transofrmation and so on ... if it's possible i'h to achieve this with a cross-browser solution!
Is it possible to add a js function to a loaded web page on the client side? E.g. IE is viewing google, can I add a javascript function to that instance of IE viewing google? I am trying to hook browser events such as button clicks and get information such as edit field text.
Provided an interface to a search engine in which the onchange event in a select list element generates between 7 and 13 additional elements depending on the option chosen.
Here's what the customer *now* wants to do: Generate between 200 and 350 elements. Furthermore, the logic is going to be more complex.
I would be happy to make that happen, however here's my concern: I'm already doing this from the server side, using CGI. I wonder what is going to happen when we put that degree of "work" on the client browser. I would welcome comments, caveats, or pointers to documentation and discussions on this subject.
I have a table that changes its cell (input text) colors when their contents have changed (actually on keypress) and shows a couple of buttons automatically, UDPATE and CANCEL. This works partially, though detecting enter and escape doesn't seem to work, or parhaps calling the button click events directly doesn't (see below).
In addition to getting the ENTER and ESC keypresses to fire their appropriate button clicks, I need to be able to collect information on which cells have changed, so on the page loading again I can read this information, perhaps from a hidden field, to use to update a database server-side.
<script language=javascript> function GirdTextKeyPress(txtID, btnsContainerlID, btnUpdateID, btnCancelID) { var txt = document.getElementById(txtID); txt.className = 'GridChanged' var bc = document.getElementById(btnsContainerlID); bc.style.display = 'inline'
var btnUpdate = document.getElementById(btnsContainerlID); if (event.keyCode == 13) { event.returnValue=false; event.cancelBubble = true; btnUpdate.click(); }
var btnCancel = document.getElementById(btnCancelID) if (event.keyCode == 61) { event.returnValue=false; event.cancelBubble = true; btnCancel.click(); } } </script>
