Calculating Dynamic Field Names
Jun 20, 2005
I have several fields being updated for a parking structure... The client inputs the number of cars and can immediately see the percentage before updating the database....
The field names always change so I need the JavaScript to be able to pick up the unique field names calculate and place into the total field box...
I found this code online, but I need to do this dynamically for hundreds of lots...
So basically I have a field name and an ID number identifying the 3 related fields...
Here's an example that works for one lot:
<HEAD>
<script type="text/javascript">
<!-- Begin
function startCalc(){
interval = setInterval("calc()",1);
[Code]....
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Jul 6, 2010
I have a form that generates field names dynamically based on a number selected from a drop-down. For instance, if I select 5 from the drop-down, it will generate 5 fields with the names email1, email2, email3, email4 and email5.
How do I loop through these to determine which ones are empty?
Code:
while (i<=ulimit)
{
emailval = "document.myform.email" + i + ".value";
//alert(emailval);
[Code]....
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Mar 1, 2011
This is some of the code I am using to add dynamic rows when user clicks the Add Row button.
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Jan 27, 2009
I've got a PHP script that pulls some records from a MySQL database in a loop. They're images, so what I want to do is have a javascript onhover thing where a big image will display depending on which thumbnail you hover over. The code I'm using is as follows:
<!-- this bit goes between the head tags -->
<script language="javascript" type="text/javascript">
function showT(q) {document.getElementById('ima').setAttribute('src','../images/properties/'+q+'')}
</script>
[code]....
Now this javascript does work, but of course it only displays the onhover behaviour in the first element, so if there are ten img id="ima"s on the page, hovering over their associated thumbnails only changes the img id="ima" at the top of the page. It would be useful if I could have the getElementByWhatever parameter accept anything from "ima01" upwards, that way I can just append $strID onto the end of the id name and make the unique identifier that way.
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Mar 6, 2007
I'm working on a financial form that is filled out and then a pdf is outputted (via php).
I'm an xhtml/css and php guy but new to javascript - I'm sure there's got to be a way to do the following with js...
I've got a section for "project costs" with 4 fields (numeric is expected). I'd like to add a 5th field "Total Project Cost" that adds all the inputs of the first 4 fields on the fly as they are typed (or at least, after focus changes).
Also I'd like to have a field which defaults to "10" and a drop down with 3 items that will either add 0, 5 or 10 to the field which defaults to 10.
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Jul 23, 2005
I have a table that I populate with an array using ASP. As each row is created, the form object names are appended a numeric, such as:
i = 1
<select name="select<%=i%>">
...
...
...
i = i+1
next
I then pass "i" to a javascript function, so that I can access the values of each form object. I can't figure out how to properly concatenate the "i" and still allow access to the value in the form object. Currently I have:
var ps = 'platSymbol' + I;
alert(ps)
var sel = 'document.frmUpdPlatGrp.' + ps + '.value'
alert(sel)
I know I'm wrong, as this comes back as a complete string. Ultimately I want to have something like this:
var s = document.frmUpdPlatGrp.platSymbol2.value - so that I can actually get the value.
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Dec 14, 2011
I have a php file with an almost-standard html form. The not-so-standard part is that the name-attributes of the form elements are dynamically generated as such:
<? for($i=0; $i<5; $i++) { ?>
<input type="text" name="field_<? echo $i; ?>" />
<? } ?>
Now I want to do some javascript validation on the fields, but I'm having a bit of trouble accessing the values of the fields. My current code is as follows:
[Code]...
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Jul 20, 2005
I need to use a different type of name for a field in a form. does
anyone know how I can access this with this kind of name?
<input type="text" name ="id[txt_3]" size="6" maxlength="6" value="">
now how can I access this name in javascript?
//this doesn't work??
document.form_name.id[txt_3].value
document.form_name.?????????.value
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Nov 2, 2009
I need the value of my drop down box options to contain size information rather than price. However I would like to be able to calculate a price for the items based on what size the user selects as well as the quantity. Below is the code I came up with (which doesn't work obviously)What can I do to get this to work for me?
<head>
<script type="text/javascript">
<!--
[code]....
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Aug 31, 2007
I am having field names in HTML with a period in them for e.g.
<INPUT TYPE='hidden' NAME='cars.toyota.camry' VALUE=དྷK'>
I need to know how to access this field name in Javascript.
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Aug 9, 2010
Have the Javascript function below which takes the name of an input on the form passed as a variable so that 1 function can check many inputs as I have up to 3 fields per form that can accept this data range.
function contact_number_check(formObj,field)
{
var obj = document.forms[formObj];
var regExp = /^([0-9 ])+$/;
alert(field);
[Code]...
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Apr 10, 2011
I have a function that needs to work for all my buttons. The below works.
function expand_toggle(num, h, o){
$(".project.1").animate({"height": h}, 2000);
$(".bar.1").animate({"opacity": o}, 2000);
}
I'd like to use the "num" var to create the div name... ie
project = eval(".project."+num);
$(project).animate({"height": h}, 2000);
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Nov 15, 2011
I have a site that has dynamically generated forms with multiple submit buttons. My forms are like this, created using PHP and inserts different user names on the same page:
[Code]....
The member name goes into the JavaScript to variable: member. The Problem: is when this JS tries to submit the form called "john" for example, it searches for a form called "member" instead and it fails. Is there any way to fix this? I'm sure there is a way to deal with this kind of issue but I don't know it yet.
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Jul 23, 2005
I have a server-side ASP script that dynamically creates an input form from
a database table. The table contains a field name, the table where values
are stored, type of input control, value for a label, etc.
What I need to do is create a JS validation routine that will check each
control for valid input, regardless of what the control name is. If it is a
"select", it needs to verify the index is > 1. If it is an "input", it needs
to check that it isnt't empty, etc.
Using known fields, I usually do something like this (page name is "me.asp":
***** code *****
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Sep 15, 2005
I am trying to use a regEx to grab Function names and function parameter names from a text entry.
The script is written in javascript and I expect the functions to be in javascript syntax.
For example the code might look like:
Code:
function myFunction1(param1,param2,param3){
some code
}
function myFunction2();
function myFunction3(param);
Whats the best way to accomplish grabbing the function names and parameters?
Should I be breaking it down into multiple regular expressions?
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Jan 6, 2010
Is there any way to set the path that is dynamically obtained in javascript to the <file> field in html form...?
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Jul 20, 2005
I'd like some help trying to generate input fields on the fly. What I
have on an HTML page is a single text input field labelled #1, e.g. #1
<input type="text">. Next to the field is a button that, on click, I'd
like to automatically generate a second text input field below the
first, labelled #2. Everytime the button is clicked, another field is
created with an incremented label.
I explored iframes, but these text fields will be part of a larger
form that has to be passed together. I'd rather not use hidden text
fields because I don't want to hardcode a limit to the number of
fields available. Please point me in the right direction, or let me
know if this isn't possible.
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Mar 14, 2011
What I'm trying to do here is to create an editing form based upon the field descriptions extracted from a database, and use jQuery (e.g., datepicker) to handle the input. So, using the datepicker example, I create an input item, make it a 'text' type, give it a name and an id, and then use $('#'+textfld.id).datepicker({ ... }) to set it up. This is NOT done at $document.ready time, but while running the form's JavaScript, so I don't know if that's the problem or not; I can't see how to use $document.ready here due to the dynamic nature of each field.
AFAICT, what should happen here is that a jQuery datepicker should be created and associated with the text field - but nothing at all is happening.
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Sep 8, 2010
I have a php script that lists some items which can be checked or unchecked. Now, I am trying to make a javascript that writes a comment field in a certain "span" - comm_'.$i.', where $i starts from 0 - if the check box is already checked (info retrieved from the database) or if the user checks the check box (when the user unchecks the check box the comment field should disappear). The problem is that I am unable to make it work properly (when I check or uncheck a box it doesn't work at all), I mean it only works for the element above, so if box_1 is checked it can only create the comment field in comm_0.
(Part of the) PHP code:
Code:
//Listing the items
<span class="olistr">
<span class="olistc" id="op">
<input type="checkbox" name="box_'.$i.'" " '.($row['state'] == 0?'checked':'').' onClick=javascript:ckState(this,"comm_","Comment",'.$i.')>
</span>
</span> .....
The error I get is - this is similar to the errors I get when checking and unchecking a check box:
Message: 'null' is null or not an object
Line: 64 (this would be line comSpc.innerHTML = 'something1';)
Char: 4
Code: 0
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Mar 21, 2005
I have a form with a number of <select> fields, some of which require additional fields to be displayed/enabled depending on which <option> is chosen. For example, in the following code, I'd like a <textarea> field to be displayed if users choose the 'Other' option:
<label for="venue_type"><p>What type of venue do you require?</p></label>
<select name="venue_type" id="venue_type">
<option value="null">--Please choose--</option>
<option value="Meeting/Training/Seminar room">Meeting / training / seminar room</option>
<option value="Computer Suite">Computer Suite</option>
<option value="Examination room">Examination room</option>
<option value="Lecture theatre / auditorium">Lecture theatre / auditorium</option>
<option value="Other">Other type of venue</option>
</select>
I'm guessing that it's possible to do this using onchange, but am not too great with Javascript .
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Feb 17, 2010
this is a code I recently found that enables dynamic creation of a file upload field within a form using javascript. I am new to all of this and have some previous actionscript 3.0 experience. Is there an IF statement that I can place inside the 'addLoadEvent' function that can limit the amount of fields created?
Code:
function fileFields() {
var x = document.getElementById('imageUpload');
[code]....
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May 23, 2009
I am trying to add numeric validation to a field that I generate once a button is clicked. The code is:
function addFormField()
{
var id = document.getElementById("id").value;
$("#appendTable").append(
"<div>"+
"<table width='820' border='0' cellspacing='0' cellpadding='5' align='left' style='margin-top:10px;margin-bottom:10px;margin-left:-2px;clear:both;'>"+
[Code]...
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Jul 11, 2011
Environment is PHP - MYSQL When the user changes the value of a select drop-down, I want to use Ajax and query one table of my database, retrieve three pieces of data, and place the data in three separate text fields in my form. Is there a simple tutorial out there that explains this?
I get the general concept of the separate php file for the query, but I'm pretty much lost.
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Jul 8, 2011
i try to make a dynamic input text on table, and it can work well, but now i have problem when i try to delete a row, the counter (number) can't work well...this script for add dynamic textfield, it work well..
$("#addButton").click(function () {
var newTextBoxDiv = $(document.createElement('tr')).attr("id", 'TextBoxDiv' + counter);
newTextBoxDiv.html(
[code]....
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Nov 25, 2009
I have a form that has a pretty complicated combo box - a user starts typing text, it queries a database for matches, and displays the results to the user. The user can then select the match they desire and it has a value id, which I am currently sending to a hidden field in the form. So, for example: user starts typing in a movie name, Seven - it returns Seven and user selects it. The form submits the id of the movie seven (say 12) to a hidden field.
Where I am stumped: Once a user selects a movie title, I have another drop down select box that is to display the available formats of the movie by querying my database based on the product id (12) and returning the available formats in the list:
DVD
BLUERAY
VHS
I am pretty good at programming, but I cannot figure this out - how to make the select box fire and return results once the value for the textbox has been captured.
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Aug 25, 2011
I am using jquery.validate.js for my validation. I need to validate some dynamic input fields. By using class now I am able to validate that. Here my problem is to validate for the file extension.
For static files I use as
file: {
required:true,
accept: "png|jpg",
},
How to write the accept validation for dynamically generated input fields. Below is my input field where the ID and name will change for every input field.
<input type="file" id="tval_1" name="tval_1" class="required accept" />
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