I'm learning javascript right now (using firebug console of browser) and have trouble understanding how to activate changes when I enter a command.
For example, one website has a dropdown box name "mvprodvaronetimeorder" with several options like:
IpA-Q-Q, IpQ-Q-Q, Ipw-Q-Q... I can use the command to get to the 3rd value:
document.getElementsByName("mvprodvaronetimeorder")[0].value="Ipg-Q-Q";
However, it doesn't activate the same action when I choose the corresponding value from dropdown box (display another dropdown to choose). Then I cant interact with 2nd dropdown box and other things after that.
Same thing happens when I try to fill a text box using command like:
document.getElementById("luckyme")[0].value="You are lucky";
While it change but the change doesnt reflect when I click the submit button, it require me to copy paste or type of at least click to that textbox to activate changes.
Is there anyone can suggest me how to automated the process from console?
Assigning the value in JavaScript updates the selection, but it doesn't notify the code running on that page of the change.
To make the page react to the change you also need to trigger a change event on the dropdown:
var el = document.getElementsByName("mvprodvaronetimeorder")[0];
el.value = "Ipg-Q-Q"
el.dispatchEvent(new Event("change"))
The page then knows the selection has changed and it shows the new dropdown below.
To find out what events an element is listening to you can use getEventListeners:
getEventListeners(document.getElementsByName("mvprodvaronetimeorder")[0])
// Object {change: Array[1]}
Related
I have a listbox in an Adobe Acrobat form. When I change the value of the listbox, the source of the image field has to be changed with a javascript script:
As a first step, I tried to change the src in javascript, so not yet with the listbox:
var logo = this.getField("companylogo"); // button field
logo.buttonImportIcon("C:\Users\VincentJanssens\Downloads\Blauw.png")
But even this code isn't working.
Thank you for getting me started!
The code can be very simple if you set the fields up to allow for that. The first step is to create buttons for each of the images you want to be available. Name these buttons such that the Export Value of the item in the Dropdown matches exactly. Set these buttons to Hidden and Read Only in the General tab.
Then add a button where you want the various images to appear on your form. Set this field to read-only too. Now, set up the Dropdown to Commit the selected value immediately and add the following JavaScript to the Format script of the dropdown. Replace the string 'displayImage' with the name of the button field you placed on your form.
this.getField("displayImage").buttonSetIcon(this.getField(event.target.value).buttonGetIcon())
Now each time the list item changes, the script will run and use the Export Value of the field to get the button icon from the button with the same name as the export value.
I've posted a working example file here.
Aspx page :
fileupload
dropdownlist subject
Textarea
User can write anything in textarea.There is no sequence, that user can first write text or upload file.Dropdownlist has onchange and selected indexchanged event.Onchange event calling javascript function which convert '<',to it's html encode character if textarea contain.On selectedindex change appropriate script of that subject code get added into textarea replacing previous one.It is not necessary that user should select subject for script,can write it's own.Every thing is working properly over here.When I selecting file other than text I want hide dropdownlist subject and want to make index at zero.
Suppose I uploaded text file,selected subject which inserted script into textarea,now I want to select img rather than text file,if I do, dropdownlist get disable and show first value document.getElementById('ddlSubject').selectedIndex = 0.Textarea is empty.Every thing is working properly here .But when I again select textfile,textarea and dropdownlist get enable.If I choose one subject which was selected previously,serverside event of dropdownlist did not get fired.If I choose other subject it call server side function.How to handle this
Please make sure you have the property of the control set as AutoPostBack = true. Furthermore, it'll be easier if you could share a code snippet.
I am building a search tool with various select drop downs that populate with options via AJAX. The possible options populated are based on the the option chosen in the preceding select drop down. For the purpose of this tool, I want to have the first select box hidden but still need to select an option in that box so that it triggers the AJAX call on the following box, something that is supposed to happen as the result of an "onchange" event.
I've tried all kinds of different code to simulate a mouse click selection of a particular option but, while I can get the option selected, it still isn't triggering the event properly to set off the AJAX call in the following select. This is as far as I've gotten:
jQuery('#form select').first().val('the-value').trigger('click').trigger('change');
From everything I've read, that should set the option value and trigger a change event much like clicking the option. Still, this isn't working. Thanks!
You only have to use val(), like any other field...
$("select").val("2").change();
http://jsfiddle.net/Loenix34/3LbjY/
We also use change() to call associated events.
Instead of setting the value of the select, set the selected property of the given option, and then trigger a change.
$("option[value='the-value']").prop('selected', true);
$("#form select:first").change();
Fiddle Demo
I have a textbox and a button (that says "Activate"). Once the value of the textbox is changed, the text on the button changes to "Search". In the code-behind, it checks whether the button's text says Search or Activate and has different course of actions to be executed for each. But when I click the button while it says "Search" on it, the action it still executes is for when it says "Activate".
This is the function I used which gets called by the textbox's OnKeyDown and OnPaste events:
function changeButtonText(){
var elem = document.getElementById("btnactivate");
if (elem.value=="Activate")
elem.value = "Search";}
I want to know why this happens. Clearly the button displays "Search" already. I don't get why the code-behind doesn't seem to recognize the change in the button's text. Btw, when I click the button again, it executes the action for "Search" then. I'm confused. Help!
Any http post back information only related to input types , label information are never posted. If you want to get them on the server side use the hidden fields In you javascript update the value of hidden field part of your FORM tag and then check its value on the server side and do what you want to do
I would like to know if its possible if I can have javascript change the values of other fields based on a user highlighting different options in a dropdown box before actually selecting the option?
So let's the user uses the mouse or arrows key to navigate through the list, before selecting an item. I would like other texts boxes to change their values as a result of this scrolling.
For the record, I have searched quite a bit. Also, the event actions (i.e. - mouse up, mouse down) only work when the dropdown box is first entered. Not on subsequent actions ... at least as far as I can tell. I also have commit selected value immediately checked, which helps because you don't have to leave the box before it fires.
Is what I want possible? Or can the scripts only run after the selection is committed?
Dropdown properties>Calculate>Custom calculation script. Place the script in that box for it to instantly update another place.
Use this formula in script:
var one = this.getField("fieldName 1").value; //fieldname 1 should be name of dropdown field//
if(one=="Administration") getField("fieldName 2").value = "Chief";<br>
if(one=="Apparatus Maintenance") getField("fieldName 2").value = "Engineer";<br>
if(one=="Confined Space") getField("fieldName 2").value = "Rescue Technician";
I think you should be able to fire some JavaScript whenever user changes highlighted option using keyboard. Because whenever a key is pressed, the OnKeyPress event of the combo is fired.
Support for mouse is trickier. When user hovers mouse pointer over an item in combo, no event is fired. The same OnKeyPress event is fired only when user actually clicks on an option.