Previous Value Of A Changed <SELECT>
Jan 29, 2004
I have a form where users need to be able to change a particular value in a <select> but need to confirm that this is what they want to do under certain circumstances. I have the script firing up ok and prompting the user, but I'm darned if I can figure out how to undo the change if required.
What I want to do is something like document.form.object.value=document.form.object.oldvalue but I have no idea what the correct properties are.....
So, how do you roll-back the selection in a <select>?
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Sep 13, 2011
seat no:225
sys_no:D0009
loc:whatever chosen from the list
Javascript code:
[Code]...
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Jun 30, 2009
How can I trigger a jquery event for when a user changes the option that is selected in a select statement? I need to update a variable with the new selected item when this happens.
View this message in context: [URL] Sent from the jQuery General Discussion mailing list archive at [URL]
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Mar 3, 2011
I have an ajax dependent drop down set up for location fields and am having trouble figuring out how to clear the dependent selects if the parent select is changed to blank.I set up a function to clearFields:
<script>
function clearFields() {
document.getElementById('cb_state').value = "";
[code]....
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Apr 10, 2009
I would like to be able to automatically select a radio box if a drop down is clicked or changed, this works fine:
But I need to pass an array such as:
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Jul 14, 2010
I'm populating a select pulldown based on the value of a previous option on a pulldown
When I run it on the firebug command line it works fine, but when it is run in the source it does not populate the html with option's for the pulldown.
$('#regions').change(function() {
town=$('#regions :selected').text().trim();
$('#town').removeAttr('disabled').after().load('rtnregions.asp?region='+town;
});
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Jul 31, 2009
I'm using ajax to update options in several select forms.Its basically, like in most automotive applications, there is a drop down for brand...once selected, it will populate another select form with the "makes" of that brand. Once a make is selected.. it returns the models of that make... and ect...The program works fine for one selection. When one brand is selected, a second select box is populated with the correct makes of cars that brand produces, however, if the brand is changed, the select box with the makes of the cars is populated by the original query..twice... and then the second query. Looking for help on whats the best way to clear both the results array; i was using this...
autobrandsf.length = 0;
and also clear out the select box, which is what the removeAllOptions() function is for. As it stands, if i use the removeAllOptions(), the makes are never populated.Here is my code, broken down the best i could, in order of process.. ish.A select form that shows the brands is displayed, once a choice is made, it passes the value of the choice into this function, which will query the database
// this is the function that is called once a brand is selected:
// h = the brand passed..
function carBrandCheck(h){[code]....
This is where, the query is returned, each row is split into an individual array, and then the second element of those individual arrays are put into yet again another array.The elements of that array are then compared against eachother to make sure there are no duplicates, storing the non-duplicates into a new array. The final array is then passed into a select form, for the makes of the selected brand.
// the ajax handler:
function handleWorkResponse(){
if(xmlHttp.readyState == 4){[code]......
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Jan 26, 2011
I'm trying to add extra DIVs after the first one on a page. This is for a CMS with form fields in them. Here is the first DIV:
<div class="OptExtra">
<h3>Additional Option</h3>
<label for="RESAddType">File type (i.e. “CD” or “Download”)</label>
<input name="RESAddType[]" type="text" id="RESAddType" size="48" class="FW" />
[Code].....
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Feb 12, 2011
I have a input field array, and have associated a change JQuery event handler if the value of any of the fields in the array have changed. So:
PHP Code:
And..
PHP Code:
In the Javascript, how can I retrieve the name (or index to be more precise) of the field that has had its value changed?
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Jul 23, 2005
Does anybody of you have a good algorithm to capture when a value in a
textbox is changed? I'm using the keypress/keydown events but they seems to
be a bit inconsistent (IE and Mozilla). Basically what I want is to set is a
"isDirty" flag when a user has changed any value in the textbox (or in a
dropdown) and then if he/she tries to leave the record without saving I want
to give a save warning. Since I don't want set the isdirty flag if you for
example klick tab, certain F-buttons, arrows (up/down/left/right) etc I
tried to capture the keypress/keydown event and ignore specific keycodes.
Since there are several keycodes that should be ignored I was hoping there
is a better solution.
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Apr 30, 2006
How do you detect that a form element has been changed? This thread:
http://groups.google.com/group/comp...25a82c9be127790
suggests that you attach onChange event handlers to every form element,
and when the handler fires you update a global 'isChanged' variable.
This technique seems to be a bit messy to me (I have many form
elements), I was thinking about storing the original form object in a
javascript variable when the body loads (in the bodie's onLoad event
handler), and upons submission, doing a javascript equality comparison
with the current form object. If nothing has changed, then the two
objects should be equal, right?
if(oldObject == document.getElementById('form'))
{
alert('has changed!');
}
Would this work?
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Jun 3, 2009
After fetching a timestamp via sql,I return to javascript to do the formatting. Actually, I was first doing a bit of formatting in php to change from yyyy mm dd hh:mm (as saved in db) to mm dd yyyy hh:mm as I found the 1st not to work with the Date() function in FF.Consider the following...
var date_from_server = "06 03 2009 01:37";
var jsDate = Date(date_from_server);
In FF jsDate is "Thu Jun 03 1909 01:37:00 GMT-0700 (Pacific Daylight Time)".In IE7 jsDate is NaN.I've tried a few different formats. Does IE7,s Date() function not allow an arg at all or only of a certain format?
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May 17, 2005
window.opener.img<%=rowid%>.src = "this.jpg";
window.opener.col<%=rowid%>.innerHTML=strReturn;
window.opener.row<%=rowid%>.style.display = "inline";
The innerHTML and style.display of the above works. Both col?? and row?? can be targeted and changed. However the img?? does not work. The ID on the tag is fine but the image wont change. Incase it was src I tried with style.display too on the image but still wont target it.
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Jul 27, 2007
I have a page where I load in a template from another company via IFRAME, the template I cannot change, but on a certain page of the template within the iframe I would like to tell the user some extra information, but my page remains the same and only the information in the iframe reloads, so is there a way to tell when the iframe changes so i can innerHtml some extra info on certain parts?
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Jul 23, 2005
I would like to change the alt-text with the changing of the image during a
mouseover action.
Can document.images[0].altView be changed dynamically?
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Jul 20, 2005
I've got a web site that is frequently updated; yesterday several
subscribers contacted me to say they couldn't see the update. I suspect
this is a cache problem, so is there a way to force a page to be
reloaded when it is changed. I realize it is too late for the current
pages, but I'd like to include something later.
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Jun 18, 2010
[code]I am having a hard time coming up with jquery code to have it so if I rollover something in .list that it will change the background image in #column2.I am thinking that building an array of IDs and IMAGELOCs would do the trick. Basically the PHP is going to give me IDs and Image Locations.I am just not sure the best way to write the jquery (cleanly) to perform the functions I want. I also want it so when you click the LI that the ID number that matches the DIV inside of #column2 will be shown.I understand jquery on a "copy & paste & modify" basis but having a hard time utilizing FORs and such.
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Mar 17, 2011
Pardon me if i'm a bit confused while trying this jquery.This week I'm with jquery almost in every day..
[Code]...
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Mar 10, 2010
Trying to construct a sql statement to update field values contained in a form. I would like to only update the values that are changed. If the current $_POST[] values populated in the form are not changed, there is no need to add that field to the UPDATE statement... but i am not sure how to do this with javascript and pass only those values. Can someone help?
Some say that it is not worth the code processing to do this but I would like to do this if possible. I know that phpmyadmin works this way.
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Aug 8, 2009
How to I can detect if a div was changed after the page loaded?
E.g. by innerHTML function.
ps: onChange not is valid for tag div. Reference here on w3c.
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Apr 12, 2010
I have finally gotten my text to change when the links are clicked, but they switch make immediately, instead of when another link is clicked.I used code 'jscheuer1' posted on dynamicdrive which worked beautifully on the test page. When I attempted to adapt it to my site, the above happened.
the HTML Code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
[code]....
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Jul 23, 2005
I recently "inherited" a project which involves an applet on a web
page, and some Javascript event handling functions. The handler definition looks
like this:
<SCRIPT LANGUAGE=javascript FOR=Foo EVENT=mouseReleased>
<!--
Foo_mouseReleased();
//-->
</SCRIPT>
where Foo is an applet with parameter FiresScriptEvents set to TRUE.
The function Foo_mouseReleased() is a simple javascript function that just
alerts a fixed message so I know it's been called.
When I run this applet in a vanilla IE5.5 or IE6, it does exactly what
I expect - when the mouse is released, up pops my alert. BUT when I
run it on the same browser with Java Plug-In 1.4.2 installed, I don't
see it. Is there some compatibility issue with 1.4.x? Can the code be
changed relatively simply to work with both VMs, or am I looking at a
big rebuild to support browsers both with and without the plug-in?
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Oct 12, 2007
I have a form with many fields... the fields are getting values from a
database.
I've tried onunload to just submit the form regardless of changes or
not but onunload and submit isn't working for me. Now I need some
type of event that will fire when a user tries to navigate from a page
to check to see if anything has changed and if so prompt them
(confirmation) to take action or not.
I know that the reset button only takes away anything that was added
to fields after the load so there must be some way to use the logic of
reset to simply check to see if fields have changed, right?
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May 23, 2011
I'm having an issue where when I click a button it changes the class of that button
$(this).addClass('not_selected').removeClass('selected');
And then I want to make it so that button acts diffrently once it has been pushed
$('.selected').hover(function(){.....
The button is changing class fine I have checked it in firebug but I want it to then instantly respond to other jquery functions as if it has the new class?
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Jan 27, 2011
I am using jquery do detect realtime if a checkbox has changed. But i want to have a delay, otherwise when you type a long word the page changes every time you type another character.
Thi is the code:
$(function() {
var content = $('#plu').val();
$('#plu').keyup(function() { if ($('#plu').val() != content) {
content = $('#plu').val();
[Code]....
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Feb 22, 2010
I'm dynamically generating radio buttons, but in Internet Explorer (tested in versions 7 & 6), you cannot change the radio buttons after they've been added. In Firefox (testing in 3.6) it's fine. I've mocked up some code below which shows the issue. It generated up to 10 radio buttons (by random number) and checks that radio button programmatically. However you cannot manually select an already generated radio button.
HTML:
<form action="list.htm">
<div id="list"></div>
<button id="btnChoose">Add radio button</button>
[Code].....
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