When i select a file (through html file control) from local machine, before uploading i want to check if the selected file exist(because,after selecting and before submitting the form,user may change the name/delete the file from the source). so after selecting the file, i need to check the same file exist as it is using javascript/ajax. Back end is JSP.Eg: Am selecting abc.jpg from my system and changing the file name form the source as abcd.jpg, now abc.jpg does not exist. But i want to check if exist. If selected file does not exist, i want to display a message before uploading/submitting the form.
So I have an web application deployed on tomcat. That application is a document browser[URL] that renders some html pages. In one of those pages I will have a svg that will change some colors if some files are/are not deployed in the server. So I am trying to create a javascript function that open that file. The code I am using is this:
Code: <script type="text/javascript"> var xmlhttp=false; /*@cc_on @*/
Let's say that I have generated var SomeVariable = true; from server. On client side I have:
if (SomeVariable == true) { do something }
How could I first check if my variable is undefined? Or how can I say if some exception occures please don't report error, just continiue? If variable is not generated from server, it will report me an error..
I am dynamically creating CheckBoxes DropDoenlist with certain set of values of not all of then are created any time.But in Script i want to get sure whether that element has been created or not. So how can i check for radio button list and dropdown list.Below is the code for my dynamic list creation:
var myarray=new Array(4) for (i=3; i <7; i++) myarray[i]=new Array(8); for (i=3;i<7;i++) {
[code]...
Here is my code and i want to check if the cell exist and if it is true to take the content of the cell. But it gives me an error in the 6 line(which i believe is wrong):
Message: Object doesn't support this property or method
I have a <input type = file> button for uploading a file in my php page. As soon as i select a file from the button, i need the file data to be displayed so that i check whether the file selected has the correct data. How can i do this.
how to put the jquery once file is selected, and not Cancel is selected.
Let's assume we have
<input name="title" type="text" value="- none -" size="33" maxlength="50"> <input name="filepath" type="file" size="33"> and at another portion of that page also have a similar repeated code as above.
I want to put some changes once the File is selected not when the button Browse is Pressed. Is there any work around?
is there a way to assign an event to a file input so that when a user selects a file to upload the event is triggered and i can check out the file extension? The reason why is simple, i want to perform different actions depending on the type of the file.
I have a form with three Input File form objects in which the user can add image files. But I am worried about the problems these controls can lead, because to check the file size the server needs to receive the entire file, so serious problems may happen, for example:
1. Malicious user trying to collapse the website sending big files.
2. Users that have not seen the warning “Maximum size: 100 KB� for each image, and try to send three image files consisting in 1,5 MB each one. These users will have a bad experience waiting one hour or more to upload the images, and after that receive an alert saying “Oooops! Your image files are too big.� And also, web server will waste an important amount of resources. The same case with 100 users at the same time can be a nightmare!
I have been searching a way to check the file size on client side without having to force user to install anything, but I think that there isn’ t nothing to do with javascript. But I found an interesting PHP article that explains a way to do it with this server side language. The technique consists in:
“A hidden field (measured in bytes) that precede the file input field, and its value is the maximum filesize accepted. This is an advisory to the browser, PHP also checks it. This form element should always be used as it saves users the trouble of waiting for a big file being transferred only to find that it was too big and the transfer failed. Code:
I have a dropdown box with 2 options: Free or UpgradedI need to do 2 separate things depending on which one is chosen.If Free, then set the value in fourth text field to 9999else, set value in Fourth field to 5555.
<head> <script type="text/javascript"> function calculate()
I have some code that runs when a radio button is clicked (and thereby selected) but the problem I am having is that when I refresh the page, the radio button is still selected, but the associated code does not run. How can I check to see if a radio button is selected in this situation so that I can apply the appropriate code?
I have a form that will dynamically place a number of radio button groups on the page. I don't want the user to be able to submit the form until a value has been chosen for ALL fields. I have hidden the submit button with the though of showing it again once ALL fields have been checked. My code so far...
$(document).ready(function () { //Hide the submit button $('#MainContent_sbmtButton').hide(); //Change background of question to show clearly which questions have been answered
[code]....
This doesn't work as expected. It shows the submit button when any of the radio buttons are clicked.
If you have a form with 10 check boxes and you want to go to a certain page when you hit the submit button, depending on the check boxes you have selected, how would you do this? code...
I have a left side textbox and a find button and similarly, a right side textbox and a find button. Clicking on the either side button will display a grid with populated data. The right side button should not display any grid, IF the left side grid is not displayed and any row is not selected in that grid. for this validation, I have scripted the code as follows:
Collapse | Copy Code:
If left grid is present, if even though no row is selected in it, this method works fine. But if, no grid is present on the page, this method doesn't get called and right grid gets displayed without passing this validation.
How to get the method called even if there is no grid on the screen.
I have multiple checkboxes. How can I validate the group of check boxes so that a user can only select two. If they try to select more than two, an alert will pop up stating they can only choose two?
When a user clicks "Add To Basket" I need some javascript to check that the size option they have selected is not "-" in the form before the actual form is submitted. my form is like so:
I tried using the following code to check if the user has selected a particular option in a single select drop down has been selected, then add a class to a div to display it but it's not working and I can't figure out why. I've tried a ton of other things to but this one seems to make the most sense.
if ($("#existing-subscriber option[value='Yes']").attr('select')) { $(".information").toggleClass("show"); }
