onclick | 易学教程

onclick事件中checkForm()和return checkForm()的区别

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先上代码： <!DOCTYPE html> < html > < head > < title > test </ title > </ head > < body > < div > < a href = "www.baidu.com" onclick = "return checkForm()" > 点击我 </ a > </ div > </ body > </ html > < script type = "text/javascript" > function checkForm () { return true ; } </ script > 测试结果：测试发现，onclick里加return时，checkForm()方法必须返回true才可以触发a标签的跳转。而不加return的时候，无论checkForm()返回false还是true，都会触发a标签的跳转。来源： CSDN 作者： yangSnowy 链接： https://blog.csdn.net/m0_37742748/article/details/80596923

How to show and hide a simple <ol> list with onclick?

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Considering the following paragraph and list: <p id = "list1" onclick = "openList1()">List of Items</p> <ol> <li><a href = "/exampleFolder/file1.txt">List Item 1</a></li> <li><a href = "/exampleFolder/file2.txt">List Item 2</a></li> <li><a href = "/exampleFolder/file3.txt">List Item 3</a></li> <li><a href = "/exampleFolder/file4.txt">List Item 4</a></li> <li><a href = "/exampleFolder/file5.txt">List Item 5</a></li> </ol> How can I show and hide this entire list with Javascript? <script> function openList1() { ... } </script> I thank you for the attention! You can give an id to the OL list. <p

ASP.NET Textbox TextChanged and Button OnClick event interaction?

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I've got an ASP.NET application that I'm accessing through Google Chrome. On a particular page I've got an asp:TextBox with a OnTextChanged event that recalculates a few other fields on the page. I've also got an asp:LinkButton with an OnClick event that saves the changes to the database. I was facing a problem where the user left the TextBox by clicking on the save button. The button was firing before the TextChanged event so the changes were not being captured in the save. I fixed this by duplicating the TextChanged logic at the beginning of the save method. Did some testing before I

submit button grayed out

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I have a submit button on a form that is quite important. I do not want users clicking it more than once. Is there a way to make it unclickable or grayed out after they click it. (maybe an on click event?). My simple code is below <form method='POST' action='index.php'> <input type='text' name='text' id='text'> <input type ='submit' value='submit' name='submit'> </form> You can use an onclick event to grab the button and set its disabled property to true. <input type ='submit' value='submit' id="my_submit_button" name='submit' onclick="document.getElementById('my_submit_button').disabled =

jQuery toggle click

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问题 Say I need an element to animate when clicked. To do this I just: $('#header .icon').click(function() { $('#header form').animate({width:'195px'}); }); But how would I make it so that when I click the element again the opposite animate takes place? (e.g. animate to width: 0px; ) 回答1: You can use .toggle() like this: $('#header .icon').toggle(function() { $('#header form').animate({width:'195px'}); }, function() { $('#header form').animate({width:'0px'}); }); If it was initially out you could

Ajax-submit form on “check box onclick ”: why this error?

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问题 I need to have a checkbox which ajax-submits a form. The following code throws an error "index 112009 out of string". What's wrong here? <% form_remote_tag :url => { whatever_url } do -%> <%= check_box_tag 'whatever', nil, whatever, { :onclick => "#{remote_function('this.form.submit();')}" } %> <% end -%> Thanks for any help with this! Tom 回答1: Seems you are abusing the remote_function helper. Its purpose is to generate the same javascript as is generated with link_to_remote et al., like, to

Block an asp:Button OnClick event in C# from the OnClientClick event in JavaScript?

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问题 I have an asp:Button on my webpage, and it calls into a JavaScript function and a code-behind method. The latter makes a call to navigate to another page. In the JavaScript function, I'm checking for a condition. If this condition is not met, I want to abort the navigation so that the OnClick method is not called. Is this possible? <asp:Button OnClick="Button_Click" ID="Action1" OnClientClick="SaveValues()" Text="Action1" CssClass="specialButton" runat="server" /> 回答1: To block OnClick from

how implement onkeydown event for custom buttons in android

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I have a button defined in my layout, I implement onclick buttons without problems, but now I need to know when my button is doww and up, like onkeydown event for fisical buttons. There is something like that for customs buttons??. Because onKeyDown (int keyCode, KeyEvent event) have a int keycode but muy custom button haven't. I hope someone can take away that query. thank you in advance Yes there is. try this code. yourButton.setOnTouchListener(new OnTouchListener() { public boolean onTouch(View v, MotionEvent event) { switch ( event.getAction() ) { case MotionEvent.ACTION_DOWN: break; case

Youtube Overlay Image Div - Autoplay Underneath

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I have a div overlay on top of a YouTube iframe on this homepage . The idea is you click once and then the video would automatically play, however I just can't get it to play ball. When I set YouTube paramater 'autoplay=1' the video plays underneath the image without even clicking it. Here's the code I'm using below; <div onclick="thevid=document.getElementById('thevideo'); thevid.style.display='block'; this.style.display='none'"> <img style="cursor: pointer;" src="http://www.belfastdigitalagency.com/wp-content/themes/responsy-v2.5/random_image1.php" alt="belfast digital marketing agency

Call method which needs parameters using android:onClick in XML

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问题 I have a Button and it is defined in XML. I am using android:onClick to call a method called showMessage . Simple method example: public void showMessage(View v){ Log.w(TAG, "Hi"); } Now suppose my method needs for example a boolean and an int as parameters, how to do something like: android:onClick="showMessage(boolean isExpensive, int money)" 回答1: It is not possible to pass parameters as you did, but you can use tags: <Button android:id="@+id/btn1" android:tag="false,25" android:onClick=