form-submit | 易学教程

Javascript: fast way to check if form contents have been changed before submission

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Simple question (I guess)... I'm in an "edit-some-element" html form. As the page load, the form is filled with current element attributes (eg. name, etc.) I could modify some input fields or even decide not to do that but I click the same on submit button because is the only available one. MY QUESTION: is there a property/attribute of the input elements containig the initial input values that I can access to compare them with the current ones when I click on submit button? In other words: is there a fast way to check if at least one input field has been changed before submitting the form? (so

How to set a timer using jQuery to sent HTTP post data of HTML form

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I have an HTML form that I need to post to the server with HTTP POST and input data. Specifically, I need to send only the parameter values of all the checkboxes that are checked in the form. I need to do it if the user doesn't do it himself in 10 minutes. I am not sure the best way to achieve this but for now I am trying to use jQuery do that but sadly I don't know anything about JavaScipt or jQuery so I am trying to learn it but failing to achieve something as simple as that. I need to the run the following after 10 minutes since the page on which the form is loads. $("document").ready

Validate JQuery UI modal form within another form in MVC 4

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问题 I have a form in MVC 4 which contains several fields and, depending on the value of a combo, I need to open a modal dialog form and load into that one 3 additional fields that will impact against the same entity that I'm creating/editing in the main form. For this modal dialog I'm using the one from jQuery UI. Now, what I need to do is to validate (Required) the fields within the modal dialog in order to allow the user to retain the entered values which will be submited later by the main form

validation of input text field in html using javascript

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问题 <script type='text/javascript'> function required() { var empt = document.forms["form1"]["Name"].value; if (empt == "") { alert("Please input a Value"); return false; } } </script> <form name="form1" method="" action=""> <input type="text" name="name" value="Name"/><br /> <input type="text" name="address line1" value="Address Line 1"/><br /> I have more than one input text field, each having their default value. Before I submit the form I have to verify whether all fields are filled. So far i

How can PHP determine if the user pressed the Enter key or Submit button?

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问题 The problem I have is that I have multiple submit inputs in a single form. Each of these submit inputs has a different value and I would prefer to keep them as submit. Whenever the user presses Enter , it is as though the topmost submit input is being pressed, and so it is causing problems for the code checking which input was clicked. Is there a way for PHP to determine whether or not the input was clicked, or was just the input that was selected when the user pressed the Enter key? 回答1: You

react.js - show a message on and after form submission

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问题 On submitting the form, I want to show 'Please wait ..' and on successful submission the data returned from server. Using jQuery , it is easy to do. But there should be a React way as React does not like such kind of direct DOM manipulation - I think . 1) Am I right ? 2) How to show the message on (not after ) form submission? var FormComp = React.createClass({ handleSubmit:function(){ var userName=this.refs.userName.getDOMNode().value.trim(); var userEmail= this.refs.userEmail.getDOMNode()

Rails change routing of submit in form_for

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问题 I have a model 'Article' and a model 'Ratings' nested within articles. /articles/123/ratings I want to change the routing of the f.submit in ratings/_form.html.erb now it is so, that after pressing submit, my application routs to /ratings/111 but I want to route it to /article/123 How can I change the routing in a form_for f.submit button. I have found here something like this: <% form_for :thing, :url => url_for(:action => "update", :id => @thing) do |f| %> But this do not work for my rails

How can I inspect the values of tags during the submit of a form using Chrome Dev Tools?

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During a page's "dormant" state, I can inspect the values of any tag by entering its id in Chrome Dev Tools' console tab, like so, e.g. for a tag with the name "BeginDate": 0) Enter "BeginDate" in the console tab 1) Mash the key ...and I see the whole shebang: <input alt="date-us" data-val="true" data-val-regex="End Date must be in the format "m/d/yyyy"" data-val-regex-pattern="[0-9]*[0-9]/[0-9]*[0-9]/[0-9]{4}" data-val-required="End Date must be in the format "m/d/yyyy"" id="EndDate" name="EndDate" style="width: 164px;" type="text" value="5/14/2013" class="hasDatepicker">

how to unset post array?

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问题 every time i am refreshing the page and i am getting the same value stored in the post array. i want execution of echo statement only after submit and after refreshing no echo results.. <?php if(isset($_POST['submit'])) { $name = $_POST['name']; echo "User name : <b> $name </b>"; } ?> <form method="post" action="<?php echo $_SERVER['PHP_SELF']; ?>"> <input type="text" name="name"><br> <input type="submit" name="submit" value="Submit Form"><br> </form> 回答1: If you submit a form and then

How do I test a form submit in Jasmine?

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I have a form that does some extensive Javascript stuff before finally POSTing to it's ACTION URL. I am writing some Jasmine unit tests and want to make sure the Javascript stuff happens when the form is submitted. However, I definitely don't want the page to go to the ACTION URL while I am unit testing. I saw what seemed like a good suggestion here: http://groups.google.com/group/jasmine-js/browse_thread/thread/a010eced8db17c1a?pli=1 ...but, as I am fairly new to Jasmine, I am unsure how to implement it and cannot find any pertinent examples on the web. Does anyone have some sample code I