onchange

问题 Hellp, I am working on developing an online donation site for my page. I'd like the user to have a dropdown box with payment options ($5, $10, $20, Other). I've currently set it up to where it displays an input box if the "other" option is selected; if another option is selected ($5, $10, $20) then the input box is hidden. Furthermore, donations are taken via pay-pal and I've incorporated the Pay-Pal donate button/php into the site. I've run across the following issue: because the input box

问题 I have an input onchange that converts numbers like 05008 to 5,008.00 . I am considering expanding on this, to allow simple calculations. For example, 45*5 would be converted automatically to 225.00 . I could use a character white-list ()+/*-0123456789. , and then pass the result to eval , I think that these characters are safe to prevent any dangerous injections. That is assuming I use an appropriate try / catch , because a syntax error could be created. Is this an OK white-list, and then

问题 I browsed all SO questions and answers about this topic but I'm still unable to make my scenario work. I want to trigger a click button action when a dropdown menu option is selected ; seems simple and should be very common with AJAX. Here are the relevant excerpts of my code: <%= form_for(@test, :html => {:id => "form_id", :name => "MyForm", :remote => "true"}) do |form| %> <%= form.label "Menu1" %> <%= form.select (:Menu1, [["Option1","value1"],["Option2","value2"]], :html_options=>{

问题 I have a DropDownList that asks the user if he want to join the club: Do you want to join the club Yes No Under this list there is another list that is set to disabled as a default. This list has the departments of the club. This list will not be enabled until the user chooses Yes. I built the following code but the problem that I couldn't solve is let's assume the user chooses Yes then he changes his decision so he will choose No again. In this case the list of the departments still enabled.

问题 I have tried a number of things to try and get Selenium to pick up an 'onchange' event from a drop down menu, none of which has worked. The offending HTML is: <select onchange="doOpperation(this.options[this.selectedIndex]); this.selectedIndex = 0;" name="opps_ondemand" id="opps_ondemand"> <option value="none" id="ondemand">Mark as...</option> <option cmd="blah1" value="add">Something</option> <option cmd="blah2" value="remove">None</option> </select> I have read that Selenium IDE doesn't

问题 I've noticed that the order of 'click' and 'change' events are different in Chrome and Firefox. See this JSFiddle for example: http://jsfiddle.net/5jz2g/3/ JavaScript: var el = $('foo'); var fn = function(e) { console.log(e.type); } el.addEvent('change', fn); el.addEvent('click', fn); In Chrome this logs: change click And in Firefox this logs: click change Is there a standard for the order of events? Which should fire first? The MDN doesn't seem to mention this and I couldn't find a thing

问题 Is it possible to detect if the content of a paragraph has been changed in JQuery ? I tried the below code. <p id="test">Text</p> <button id="submit1">change</button> - $(document).on("click", "#submit1", function () { var d = new Date(); var time = d.getHours() + ":" + d.getMinutes() + ":" + d.getSeconds(); $("#test").text(time); }); $(document).on("change", "#test", function () { alert("Paragraph changed"); }); JSFiddle : http://jsfiddle.net/nnbqye55/ I guess I am missing something obvious.

问题 I would like to do an equivalent of ng-change for the entire form whenever there is a change in one of its input fields. I know that since AngularJS 1.3 I have the debounce option but it applies only for a single input. I'm looking for a "debounce"/"on change" functionality that will apply for the entire form. 回答1: There isn't a built-in way to do ng-change for a form. It may not even be needed, because if you organized your view model properly, then your form inputs are likely bound to a

问题 I need to capture when a select box changes, should be simple! $('#multiid').change(function(){ alert('Change Happened'); }); But it does not work, I suspected the problem is that the select box does not exist on document ready it is created only if needed, so I created it empty in HTML, populated it with code as a test but that didn't work either. function buildmulti(id,name,price) { // build action items for action bar var optlist = $('<select></select>').attr('id', 'multiid').attr('name',

问题 Consider an HTML form: <form action="" method="POST" onsubmit="return checkValidArray()"> <input type="text" name="data" onchange="return validate(this);"> </form> It appears (in both IE 6 and Firefox 3) that when you type some text into the input field and click submit that the onchange event fires for the input field, but the onsubmit event does not fire for the form until you click the submit button a second time (at which time the onchange does not fire, of course). In other words, the