Getting OnChange To Work With FF And IE?
Nov 2, 2011
I've developed a support page where users can drop in help tickets with javascript doing client side testing of the fields for missing data etc and php for server side handling and posting to an email address. There is also a section to add supporting images, videos etc of the bug/issue using the <input type="file" /> tag.
Although I could have done server side file size checking, I didn't want my users to wait half an hour to up load a 10Mb video just to be told it was too large to send via email.
So my client side solution was to have a function fire when a file is selected:
Code:
<input type="file" id="attachment1" name="attachment[]" onchange="findSize(1)" />
The id is name 1 because I have javascript to allow the user to add multiple "Select a file" boxes, dynamically adding 1 to the id number each time. The name is an array for the server side handler of the multiple files (if any). The onchange you see fires "findSize(attachmentRef)".
Code:
function findSize(id) {
var maxFileSize = 5242880; //5mb in bytes
var idNumber = id;
var fileInput = $("#attachment"+idNumber)[0];
[Code]....
This is the findSize function that feeds back to the user instantly if the file is too big for processing - saving headaches all round. I use some jQuery to work out which file input we are looking at and to test the size of the file. If the file is too big, an alert flag is written into the form to prevent the user from hitting submit (one of my client side test conditions for checking the form confirms that this flag is 1 not 0).
Issue: The code works fine on my test browser - Chrome. But in my next step test (FF 7.0.1 and IE9) nothing happens. I can locate and add a file for upload, but the onchange doesn't fire. Or is it something in my function that is causing the bug? I'm using jQuery 1.4.4 for your info.
how to implement onchange with different browsers - something about IE and FF differing in what they mean by a change and when it happens; but I admit I'm a bit lost. Can any one spell out a solution ABC fashion?
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Mar 15, 2011
this will not work on change. also the innerhtml wont display. please help. here is the js:
function checkemail(){
if (document.suform.email.value && document.suform.emailcheck.value)
{
if (document.suform.email.value == document.suform.emailcheck.value)
[code]...
and here is the html:
Re-type Email: <input type='text' class='rfield' name='emailcheck' id='emailcheck' onchange='checkemail()'></td><td style='position: relative;'><div id='wm' style=' font-size: 11PX; position: relative;'></div>
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Jul 20, 2005
I've written some kind of menu to display a diagram with input fields
for a budget plan. A user should be able to change values, which are initially filled by
a database value, and get all corresponding values filled by the
program.
//value given by database
showText[k].setAttribute("value", eval("liste[i][TEXT" + k + "]"));
//onchange event for the user to change the value
showText[k].setAttribute("onchange", "calculate('cost" + i + "')");
//function to recalculate corresponding values
function calculate(myId) {
if (myId == "initial") {
...
}
else {
myId = myId.slice(4);
//getParents(myId) returns corresponding values for myId
var myParents = getParents(myId);
for (var i = deep; i >= 0; i--) {
var sum = 0;
for (var j = 0; j < myParents.length; j++) {
...
for (var k = 0; k < children.length; k++) {
sum +=
parseFloat(document.getElementById(eval("'cost" + children[k] +
"'")).getAttribute("value"));
}}}}}}
My Problem is:
IE and Netscape always use the value initially entered by the database
and not the new value entered by the user.
Is there a timing or DOM problem?
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Jun 29, 2009
I have a select option drop down menu and I'm using onChange in order to write text in a div. But, when I test the drop down nothing is happening.
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Mar 4, 2011
I have client side scripting for a text box value which truncates value if user enters more than 255 characters. For this i use both onchange and onkeyUp events. I added Server side validation too(more cautious) to restrict user from continuing the page if he enters more than 255 chars. We are using this product from 7 yeras and yesterday one of the customer said that(he has a screenshot too) he saw the server side error message. this explains that my client side javascript methods doesnot fire. he is using IE browser.
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Oct 22, 2009
Wrote what I though would be a simple script to convert Fahrenheit to Celsius, feet to meters... and vice versa. It uses onchange="calculate(this)" in the input fields, so when the individual enters a number and hits tab or enter it automatically calls the calculate() function and does the needed conversion. I'm passing (this), 'this' being the input field, and calculate() pulls out the needed data for the conversion.
It works great in Firefox. But in IE or Opera, the calculate() function never even gets called. I've searched for an answer, but to now avail. I haven't written much JavaScript and am not entirely sure what's causing the problem. Kinda makes me think of Java, where if you want to use action listeners, you need to first instantiate a listener object. Is there somekinda event listener in JavaScript that Opera and IE want instantiated? Here is my code in it's entirety.
[Code]...
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Jun 23, 2009
I am trying to make one application. When we slect value from select box . It will show same type of row according to which value we select from select box.
Let me explain my problem: select box have value 0,1,2,3 . When we select 1 then it will show one row below the select box naming person1 name (input box for name of person1). if we will select value 2 from select box then it will show two row according to select value Like this
person1 Enter Name of person1
person2 Enter Name of person2
By default it have value 0 then it will not show any row below the select box.
i want to do this. But i do not know how i can do this . I think for this i have to onchange event in select box .But in correct way i do not know how it is possible.
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Nov 17, 2011
I am trying to include two functions in an onchange when the user selects a new value from a select list: It is a quite big form form - There are one select list, when changed - TWO other fields in the form needs to change accordingly: I put the information back using ajax and place it within a <span id="blah"></span>; I have checked the span ids, and they are correct! Unfortunately, the second function disables the first one This is the select list with the onchange functions:
[Code]..
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Apr 16, 2009
I have 2 dropdown lists which are connected to a mysql database. When I select an item from the first dropdown list the second dropdown list should show item which are linked to the item from the first list. But the thing is I can select an item from the first one, but the second isn't showing anything.
In the mysql database I have 2 tables: hesk_programma and hesk_projecten. In table hesk_programma there are a ProgrammaID and Programma column. In table hesk_projecten there are a ProgrammaID, a ProjectNumber and a Project column.
ProgrammaID from the two tables are connected to each other, so when I select an item from the first dropdown list with the ProgrammaID AK, the second dropdownlist should only display the items with the ProgammaID AK from the hesk_projecten.
Here is the code I use:
PHP Code:
<?php
mysql_connect("localhost", "root", "");
mysql_select_db("bestellingen");
$query = "SELECT * FROM hesk_programma ";
[Code]....
By the way, one more thing. The ProjectNumber from the hesk_projecten table should be displayed (when selecting an item in the second dropdownlist) in a input text field.
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Jun 20, 2011
I've got this listbox full of hundreds of employee names. Clicking on a name executes a function using onchange. Because of the length of the list I decided a search function would be really handy and I finally found one that works.
Now the search function, when you type in the input box, scrolls the list to the first matching entry. And that's good, that's what I wanted.
The problem comes in when you try to click on the name the search function found. Nothing happens ofcourse because the onchange tag in the list reacts to changes, not direct clicks.
code:
The list is populated by java but for testing I disabled the function that clears the "Loading" option and I set it to selected. That way the loading option is highlighted by default and the search function is free to highlight something else, then when I click on the search result it works like it's supposed to.
But keeping a highlighted option at the top of the list for that sole purpose isn't very elegant, especially since if you click on it the onchange function tries to execute and generates errors. The only solution I can think of is to use java to generate another option way at the bottom of the list that has the selected attribute but I don't quite know how to do that.
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Jan 28, 2011
Is there something that will update as soon as the user changes information in a textbox as appose to what onChange does, which is update once the focus has been taken off of the textbox? I am writing a custom cart and I am using AJAX to update the price according to how many they are ordering, I was hoping to have it update the price as soon as the user put in the volume, but it doesnt update until the user clicks somewhere else on the page.
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Feb 10, 2010
Can I target the element and base an onChange outside of directly calling it in the element tag?
Due to the nature of my script, the best I can do is wrap a tag around the element.
example of what I am trying to do
Code:
<script>
document.form.field1.onchange = function();
<script>
And if this might work, can I call it in the head or must it come after the element.
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Jun 14, 2010
The "Permission denied" cross site issue.
I have to check from my external domain if a service is running on localhost:8080 of a local machine.
I'm using XMLHttpRequest to do it.
I'm checking a local-web-server, not a file.
Every browser doesn't work, but Firefox. So I'm looking for a work-aorund.
An iframe? a flash swf? an applet java? HTA applications?
A side question is, why does FF work? Because it's a local-web-server?
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Mar 30, 2010
I cant get my cookie to work. I believe its not my javascript that is wrong. Can anyone take a look to see what i did wrong in my cookie? I have to pages dropdown1.html and dropdown2.html. Both pages have the same exact dropdown list. There is also a javascript file called script.js which makes it so you get an error if you select the same option on the second drop down list as the first. Also in the script.js i have a cookie that should run so dropdown2.html should now what was selected in dropdown1.html Can anyone see if i made a mistake in either my javascript code in my cookie? Right now I am not getting the error message if you select the same option as the first. Ill show all my code incase you need it for reference
dropdown1.html
Code:
Code:
Script.js (this is the part where I cant figure out why the error message does not appear on the second dropdown menu if user selects the same option as the first)
Code:
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Jul 23, 2005
In the next sentence, what's wrong?
<select name='id'
= 'Daniel Perez'&valor='+this.options[this.selectedIndex].value">
IE complains about missing ";"
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Jul 23, 2005
I understand that the onchange event occurs when the value of a
form element changes (and after the element loses focus).
But what about the case where the value of a text box (for example)
is changed from a javascript function? Is an onclick event triggered
in such a case? I find that this is not happening in IE.
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Jul 11, 2006
I have a big problem with a simple event : onchange!
If I write this page:
<html>
<body>
<form id="vu">
<input id="var01" name="var01" size="5" onchange="return false;"/>
</form>
</body>
</html>
everything is ok in IE (I can't leave the input zone !) but nothing happens in Firefox!
It looks like the event is not fired or...
Do you have any clue?
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May 23, 2007
I have a button that opens a calendar and populates a text box. I use
the onclick event to open the calendar.
Now the textbox has a onChange event that calls a function. The
onChange fires perfectly if I type the date on the textbox, but if the
calendar changes the date on the field then the onChange event doesn't fire.
I even try the following, but it seems that both functions run at the
same time and the value on the field is never picked up.
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Jun 14, 2007
I was working on a site that uses Google Checkout buy now buttons, and
I wanted the product picture to change based on what was picked. I was
able to have it change the picture, but if you pick a new item after
that, it keeps the same picture. Here;s the code:
The box (only the first part):
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Jun 1, 2011
I have the following code running on my site...
Code:
<script type="text/javascript"> function test_func() { alert("You clicked the map."); } </script> <form action="#"> <input type="button" onclick="test_func();" value="Test"/> </form>
It works fine, but I want the form to call test_func onchange instead of onclick. I want to add an input type='text' named call_func that when changed, will call the test_func function.
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Jun 2, 2007
I'm having problems. I am collecting data from an XML file and serving it up to a web page. Here's the code.
The thing is, I have taken a Submit button away and want the data to appear as the user types. I tried using onChange event handler but it only works when I click the mouse away from the input box, like an onBlur() event. Code:
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Oct 26, 2007
I have 2 html menu.html and menu2.html, and would like to swich one another using "onChange" in each form. function pageCh works first time, but it doesn't 2nd time.
alert("menu2") does not pop up either. Code:
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Jan 19, 2006
How can I change a select list when a user enters a value into a text box? Like with the below form I would like to have the select box change when the user enters a value in the "id" text box that matches a value in the select box. Say the user types "1122" in the text box I would like the select list to change to to show "John". Is this possible ....
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May 16, 2003
I have a web-based form which allows users to enter marks for a group of examination candidates. I have a function which performs some calculations on the data as it is entered and displays it immediately. The data-entry form-part definition is:-
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Sep 23, 2003
does anyone know of a way of forcing the onChange() event of a control (it happens to be a <SELECT> if that is relevant) to fire off? (That is apart from the obvious one of changing the value with the mouse / keyboard!!!!)
I have some code which alters the currently selected element in a list and I need the list's onChange to then be fired off. The code is designed to work with many different lists, so I can't hard-code the same functionality into my code that is normally provided by the onChange.
I've tried ....element.onChange() and .....element.Change() but neither of these seem to work.
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Dec 29, 2004
<form> onchange event doesnt work in IE. but works in Mozilla. Is there any other alternative in IE for <form onchange>????
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