Javascript To Determine Which Form Element Is Displayed
Nov 12, 2006
Im trying to find the correct syntax to use to determine whether which form
element is visible on changing the value in a dropdown list
I need something in the onChange of the dropdown list that will cause the
appropriate element on another part of the page to be displayed Code:
var mydropdownlist =
document.questform.typeid.options[document.questform.typeid.selectedIndex].v
alue;
if(mydropdownlist<6)
then display <input name="ans1" type="text" >
else
display <textarea name="ans1" rows="1" ></textarea>
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Oct 11, 2006
I created this test routine to return the form containing a certain
input element:
function GetElementForm(element)
{
// Return the form that contains element.
varmyElement = element;
while (myElement)
{
myElement = myElement.parentNode;
if (myElement)
{
var sTagName = myElement.tagName;
if (sTagName)
{
if (sTagName.toLowerCase() == "form")
{
break;
}}}}
return myElement;}
This seems to work for "well formed" HTML, but fails for example, when
a form is defined within a table.
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Oct 2, 2005
If I had a webpage that displayed a database in tabular form, it would
be nice to know how many lines of text the browser could display
without scrolling, then have the cgi script output the appropriate
number of lines of data to fill the screen.
I've seen examples of how to get the browser window size in pixels, but
is there a way to determine the number of lines that are displayed?
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Jul 20, 2005
Is it possible to dynamically determine the current field element in a
form?
I ask because I have a 'tab' button on a form, and when a user clicks
on it I need to be able to shift the focus to the next field, and also
if the current field is the last field on the form, essentially to do
nothing.
Conceptually, I guess I'm trying to do something like:
function clicktab(){
variable = current.field.element.number;
if (variable < n) {
variable++;
document.forms[0].element[variable].focus;
}}
In the above function, "n" would be the total number of fields in the
form.
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Jul 27, 2011
I have a floating div that stays at the bottom of the browser window while the user scrolls down a long page. The div reads "scroll down for more". How can I determine the current position of the div in relation to the top of the page, not the top of the browser window. I need to determine this because I would like to hide the div when the user scrolls to the top of the last page. I have looked at offsetParent, offsetHeight, scrollHeight, etc.
I have the code for everything except determining the position of the div, or the distance of the div from the top of the page.
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Jul 27, 2011
I have a floating div that stays at the bottom of the browser window while the user scrolls down a long page. The div reads "scroll down for more". How can I determine the current position of the div in relation to the top of the page, not the top of the browser window. I need to determine this because I would like to hide the div when the user scrolls to the top of the last page. I have looked at offsetParent, offsetHeight, scrollHeight, etc.
I have the code for everything except determining the position of the div, or the distance of the div from the top of the page.
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Nov 1, 2011
I have this odd situation in which a function receives an element that needs some cleanup; all events to which it is bind to should be removed
Unfortunately, I don't know if the events are bind using 'bind' or 'live'
Is it possible to use find this out somehow using only this element ?
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Apr 4, 2003
I tried searching in the forums for this, but the search function keeps saying I can't search on less then 3 keywords? (I used the string in the subject!) Anyway... is this possible? I want to determine if JS is enabled, and display a "you must enable javascript to continue" if not.
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Nov 16, 2005
I want to create a link to an email conference which is on 2 servers. Some users will only be registered on server1 and others will be registered on server2. however I don't know which users are on which server.
Is it possible to create some kind of JavaScript function which attempts to open a link to server1 and then if this fails default to server2. It would be far more user friendly.
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Jan 20, 2010
I'm trying to determine if the id of an element matches a String that has multiple parts.
Code:
function platformChange (this)
{
thisID = this.id;
[code]....
The value of this.id is "platform_SWFUpload_0_0" but the result of thisID.match (pattern) is null.
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May 31, 2005
I call methods in a Java applet with javascript code like this:
document.myApplet.methodName();
This works great when the applet has loaded (the JVM has started and dowloaded all the jars) but it fails if the applet hasn't loaded yet, at which point it gives an error:
Quote:
Error: Object doesn't support this property or method
Is there a way to determine that the applet is loaded or not so that I can use it in an if statement? For instance, like so:
Code:
if (isAppletLoaded()) {
document.myApplet.methodName();
}
I tried
Code:
document.myApplet == null
but that didn't work.
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Jan 10, 2010
I'm using simple jQuery dropdown menu
Code:
<script type='text/javascript'>
jQuery(document).ready(function() {
jQuery("#dropmenu ul").css({display: "none"});
jQuery("#dropmenu li").hover(function(){
jQuery(this).find('ul:first').css({visibility: "visible",display: "none"}).show(268);
},function(){
jQuery(this).find('ul:first').css({visibility: "hidden"});
});
});
</script>
What I need is: when someone clicks on submenu that element would be stay displayed under parent element.
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Jun 29, 2006
Im doing a webpage, which will call the window.open to link to another page. my code is like this:
<script>window.open("../../mySite/index.jsp?link=<%=link%>","_parent","status=yes,toolbar=no,menubar=no,location =no","true");</script>
bt when i view bak the page,
","_parent","status=yes,toolbar=no,menubar=no,location=no","true");
this line displayed in the page. wat happen to the line of code?
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Oct 5, 2001
I am having difficulty using javascript to validate form fields with whitespaces in the element names (ex: First Name, Last Name).
here's a code snippet:
###
function validate(formObj) {
if (document.form1.Payment Method.checked){
do something here...}
###
the problem is that javascript won't read the element "Payment Method" unless i mash the name into one word. (i don't want to do that because i later use the element names to provide a printable customer receipt
i tried using the ascii octal number for a whitespace in the above code (...form1.Payment40Method.checked...), but to no avail.
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Jul 20, 2005
I'm new to javascript and PHP and I am wondering if there is a method or function to capture a 404 error in the event a particular html file cannot be found. I want to redirect that error to another page or design the code to send me an email telling me what page was selected and not found. In other languages I can trap such an error and respond to it.
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Jan 19, 2010
How do I determine whether a variable exists in a form. I have a form called "theForm". I want to determine whether the variable "THIRD_PARTY" exists in the form and if it has been set.
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Jun 6, 2004
alright I'm writing form which calls out a function F1 onsubmit but I want it to do that based on what the user answers to the last question on the form
this question has a yes/no answer, if the answer is yes, I want it to call F1 as it would and the function basically sends the form contents to two different places, if the answer was no, I want it to just submit it to one place.. Code:
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Jul 16, 2010
looking for the best current way to determine the coordinates of a form's text input that the user just clicked, so that I can use that info to dynamically position a select menu that I will make become visible just below that text input.I am finding all kinds of things.. but most are unclear to me, or worse.what they feel is the proper best current way to go about this
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Jan 9, 2011
Just wondering if anyone has ever managed to validate a form that is loaded in a lightbox? I've search everywhere, so it's either really hard and nobody knows or so simple that nobody thinks it's worth mentioning!
Overview
I have managed to create a form that is validated using a jquery script. Works fine, when loaded as a regular .html page.
Problem
However, when I load the form (from a clickable link) that displays it in a lightbox, all validation disappears! Although the form still displays and submits data.
Is there a special way to validate forms in a lightbox?
Or can anyone recommend a lightbox script/plugin that comes with data validation?
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Feb 14, 2010
I am having a particular problem with my Javascript page, which should change the form that the user is at. Need to proofread my code to check for errors? The code does not change the form (Also it does not run the PHP page, or at least does not display its output in the loginStatus div):
<html>
<head>
<link href="style.css" rel="stylesheet" type="text/css" media="screen" />
<title>
PHP Hardcoded Login Script!
</title>
<script>
function processLogin(form) {
var user = form.user.value;
var pass = form.pass.value;
var url = "processLogin.php?user=" + user + "&pass=" + pass;
if (window.XMLHttpRequest)
{// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
}
else
{// code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
} .....
Why this is not working? The page running this code can be found at: [URL]
Another page without the signup form (that works) is at:
[URL]
The login for the pages is:
user: john_doe
pass:password
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Oct 18, 2006
Given a drop down list such as:
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?
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Jul 27, 2007
Code:
test.div.style.backgroundImage=test.div2.style.backgroundImage;
It works if I specify the actual background image within the function, so I know the image is there, and I know it's been properly assigned to div2, but div1's background image doesn't change.
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Oct 13, 2009
I'm having some problems understanding the append() function. What I'd like to do is select an element using it's ID and add a row to the table with a HTML form element. The table is dynamically generated using a Django template ( form.as_table() ) so I'm not able to alter the original HTML markup too much.
If I had a table like this...
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Jul 26, 2010
I have created a form with malsup's Form Plugin wherein it submits on change of the inputs. I have set up my jQuery script to index drop down menus and visible inputs, and uses that index to determine whether keydown of tab should move focus to the next element or the first element, and likewise with shift+tab keydown. However, instead of moving focus to the first element from the last element on tab keydown like I would like it to, it moves focus to the second element. How can I change it to cycle focus to the actual first and last elements? Here is a live link to my form: [URL]. Here is my script:
$(document).ready(function() {
var options = {
target: '#c_main',
success: setFocus
[Code]....
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Aug 26, 2010
I have a javascript here for adding my div element to my registration form,Adding the div element is easy, but it shows on the bottom of my form. I cant make it as the first child element of my form...This is my code
var _form = document.getElementById('registration_form');
var errorDiv = document.createElement('div');
errorDiv.setAttribute('class', 'confBox');
[code]....
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May 10, 2011
I tried jQuery('#calculateform').children('input, select, textarea').each(function(key){ alert(key + ': ' + jQuery(this).val()); but it goes only 2time throw (for each button it has)and it SOULD list all elemts (including hidden fields). I need each element with name and value.
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