Creating A For Loop To Detect How Many Selects Are On Form
Jul 23, 2005
On my form i have multiple select which all have an id value total1, total2,
total3 etc so i am trying to detect how many there are and then use this to
caculate a total.
Is there a javascript reference to basically go to a form and produce a loop
which will show me how many select drop down boxes there on a form.
Or would i have t use something like
for (var i=0; i < frm.elements.length; ++i) {
form.elements.length
form_field = frm.elements[i]
and then have a nested if to detect if it is select value or has an matching
value ..
I have difficulties placing a menu over a select box. Whenever a menu item pops up over a select box, it's not rendered right above the select box. The menu will not appear over select box which splits up into two parts: one part with items above the select box and a second part will all remaining items below the select box.
It works in netscape,but not in "IE". i hv tried to add the specific z-index, but still fail to display in IE. some people use <display:none> to make the select box disappear. However it will look strange if the select box is bigger than the menu.
The idea here is to have a function in javascript that would take the value from one input box (lets call it txbA) and use it as the limit for a while loop or for-next loop and create a series of input boxes each with a unique name so that its value (when entered or changed)could later be used in other calculations.
When I try something like:
function MakeMany() { var y=parseInt(txbA.value); for(var x=0;x<y;x++)
[Code]....
You can call this from a button and get the text boxes, but how do I get them to have unique names such as MMtb1, MMtb2, MMtb3 etc. ??
i was assigned this task(see attached), but for some reason I'm having trouble getting it to work, i don't know if my problem is in the algorithm or if I'm using the wrong structures to solve the problem.
I am trying to create a function that creates an array comprised of filenames based on a given range. I.E if 2-8 is selected and a foldername of UMCP/ and a common name of college is also given, the function should return and array such as [UMCP/college2.jpg,UMCP/college3.jpg.....UMCP/college8.jpg]. Here is what I've got but the alert that should tell me the filename of the first image says it is undefined, how can i fix this?
function getArrayPhotosNames (total,count,first,last) { /*window.alert("get Array Photo Names");*/ var folderName = document.getElementById("photofold").value; var Alias = document.getElementById("commonName").value;
I am trying to create a simple HTML table with the squares of numbers and for some reason the loop is not triggering.
Code:
<table border="1"> <tr><td><h2>Table of Squares</h2></td></tr> <tr><td> Number
[Code]....
When I run the page all that comes up is the start of the table that is written before the script executes. Also is there any way I could use a debugger to catch this on my own? I tried the firefox debugger but it didn't catch anything when I ran it through, maybe I was just doing it wrong.
I have been struggling with a loop of mine. The loop should create a grid, of 204,000 squares(div's). And the total would create a grid field of 340 pixels by 600 pixels. All div's are sized 1 pixel.The idea is to create a grid, that shows temperature data in a gradient style, like a weather heat map. The data is collected from temperature sensors which are connected to a database.The only problem is that because it's such a massive amount of calculations to be calculated by javaScript, the whole thing freezes. Here is a sample of my code:
Code:
function makeGrid() { for (var i = 0; i < 8160; i++) {
[code]....
Another problem is, the grid should be reloaded every 5 seconds or less.Because that's the interval used by the temp sensors, and for the usage that's planned for the project, its really important that the data is constantly up to date. using another web based language are welcome, as long as they are combinable with PHP or AJAX. Or maybe there is a ready to use library that I dont know of. Couldn't find anything for jQuery.
Code: <SELECT NAME=sections > <OPTION>Merge</OPTION> <OPTION>Nuke</OPTION> <OPTION>Merge & Nuke</OPTION> </SELECT> If one selects Merge, then i want another form displayed with input fileds etc.
Can anyone show a script (i.e. javascript) that does just that or care for a example?
I have several elements that I can perform show hide and fadeIn animations on but I want the action to continue on an endless loop. Is this possible? If it is, are there any cpu usage issues when using a loop? <script type="text/javascript"> $(document).ready(function(){ $(".upright").hide(300); $(".cntrlg").show(300); $(".cntrlg").hide(300); $(".cntrmed").show(500); $(".cntrmed").hide(300); $(".cntrlg, .lowleftmed").show(100); $(".cntrlg, .lowleftmed").hide(100); $(".lowrightmed").show(300); $(".lowrightmed").hide(300); $(".cntrmed").show(300); $(".cntrmed").hide(300); $(".upright").show(2000); $("#dai1").fadeIn(3000); $("#dai2").fadeIn(3000); $("#dai3").fadeIn(3000); $("#june1").fadeIn(3000); $("#june2").fadeIn(3000); $("#june3").fadeIn(3000); }); </script>
I have a search form that a user selects item from dynamic list hits the submit button and it returns each matchingresulton same page in an update form, i have 2 checkboxes in update form that updates the DB when 1 is checked, this all works fine until i check the checkbox the data updates ok but allremainingupdate forms are removed because the page refreshes.
So i need to update formstwith out page refreshing but i cant get it to work with multiple forms on same page.
I need to create a form that expands or collapses with more or less fields to fill in when the user selects or deselects a check box on it. This form also needs to be secure. What is the best way to accomplish this?
I'm looking for a way to detect form change in jQuery. For exemple Idisplay a big and dynamic form pre-filled with values and splitted intabs.I would like that when some form values in a tab is changed an iconappears showing that a save is needed. I also would like to have analert if the user click on the menu without saving.Is there an existing plugin or has someone already done this kind ofthings ?
What i'm trying to do is pretty simple. I want to detect if the value of a field in a form called "check" and if the value is "1" return the user to a different page. i also want it so if the value is anything else the user is returned to the homepage. Here's what i have so far:
I have multiple submit buttons in a form, with the same name. ie code...
Is it possible to detect which submit button was presed, from within the onsubmit handler for the form, or would I need to apply onclick handlers for each button, and submit the form as part of the function?
I'm a non-web programmer being forced to do some web programming.
My immediate problem is that, on submission of a form, I need to be able to open a url (that I control) with the filled-in form values appended to the new url. In other words, I need to be able to do the equivalent of :
I'm creating a form that has 30 odd fields, and I want to display certain fields based on the value of a select box. So say I have the following groups:
Group A: field 1 field 2 field 3 field 4
Group B: field 2 field 3 field 6 field 7 field 8
Group C: field 2 field 7 field 8 field 9 field 10
What would the best (i.e fastest and easiest) way to show/hide the various fields? I was thinking about two different ways to approach this. One, having a multidimensional array with the allowed fields for each group. Two, having a custom attribute that defines which group(s) the corresponding form field belongs too. What do you think?
Basically it loops thru the table and creates a row of fields in the form that use the array identifiers '[]' so that I can loop thru them with PHP when the page is submitted.
The key for each array element is the id of the row from the database. So checkbox[] (with value "1") and cost[1] are on the same line in the form. The next line may not necessarily have cost[2] in it, it may be cost[3] or [4], depending the id from the database.
Is there some way I can loop thru these form elements in javascript?
So I need a function to loop through a forms elements and if a value is matched then check that radio button. I have the function call in some other javascript but her is the jist.
The Function function loopForm(form) { for (var i = 0; i < form.elements.length; i++ ) {
Is it possible with JavaScript to create new form elements on a webpage that has already loaded in the browser? For example, what I am hoping to do is have a text field for a name and a link that lets them add another text field for another name etc. I believe I can do this on a DIV but haven't looked at coding it yet. Any thoughts, pointers etc?
