onkeydown

I'm working on key handling in Javascript. I have done some research and I'd like to know whether I have a correct understanding of key handling. KeyDown/KeyUp Event The key down and key up events are supported by IE7+ and Firefox 3.5+ I didn't check the earlier versions of the browsers, but I guess that they also support these events. Is it correct to say that each key on the keyboard will always have a keycode. CharCode CharCode value is available on the keypress.Majority of the keys will have the charcodes that represent the actual value. Some keys won't have a charcode associated with them

Suppose I have two textboxes: <input type="text"id="resourceName" placeholder="Resource name"/> <input type="text" id="barCode" placeholder="barCode(EAN-13)"/> To populate this textboxes I use barcode scanner and keyboard. What I want is a little bit difficult and I don't know how to do this . I can't differentiate when user is populating text boxes with keyboard and when with barcode. I need this becouse i want to implement something like : when user is usign barcode scanner and if we don't have focused textbox ,I want to focus barcode textbox and insert this value in this textbox , and when

I'm working on a site that is full of forms to be filled and I it's required that when escape button is pressed focus move to the next input control, just as pressing "tab" do. I found code to move focus when keypressed is 13 but this need to take the ID of element to focus on <input id="Text1" type="text" onkeydown="return noNumbers(event)" /> <input id="Text2" type="text" /> <script type="text/javascript"> function noNumbers(e) { keynum = e.which; if (keynum == 13) document.getElementById("Text2").focus(); } </script> I need a generalized function that when key pressed code is 13 "that is

问题说明 在含有搜索框的网页中，经常需要及时匹配搜索项，因此需要监听input输入框的变化事件。如果使用 onkeydown、onkeypress、onkeyup 这个几个键盘事件来监测的话，除了监听不了右键的复制、剪贴和粘贴这些操作以外，在输入中文的拼音时同样触发，增加请求数不说还浪费流量。 解决方案 本文结合标准的oninput 和 IE 专属事件 onpropertychange 事件来监听输入框值变化。oninput 是 HTML5 的标准事件，对于检测 textarea, input:text, input:password 和 input:search 这几个元素通过用户界面发生的内容变化非常有用，在内容修改后立即被触发，不像 onchange 事件需要失去焦点才触发。 代码实现 $().ready(function(){ //页面加载完毕绑定输入框的oninput事件 var bind_name='input'; if(navigator.userAgent.indexOf("MSIE")!=-1) { bind_name='propertychange'; } $('input').on(bind_name, function() { do something... }); }); 参考链接： http://www.runoob.com/jsref/event

We are using Delphi 7 enterprise edition, application is build on windows XP, testing on both Windows XP and Windows 7. In an application we maintain, something strange is happening. For some reason hitting the "-" key (qwerty layout, between "0" and "=" keys on top) does not register at all. We checked in the OnKeyDown of the edit we found it with, the OnKeyDown of the form (with and without key preview) and even the ProcessMessage routine, but the event for this key never reaches the application. We get the same results for OnKeyPress. Yes, the "-" key on the numpad DOES work. Also, this

I have this code function verifyKey(e) { var keycode; if (window.event) keycode = window.event.keyCode; else if (e) keycode = e.which; regex=/[1-9]/; if(regex.test(keycode)) return true; else void(0); } in the html I added an input and I add the onkeydown event onkeydown="verifyKey(event);" I like to verify the key before it display on the text If the key is a number or coma(,) or full stop(.) then accept the key else refuse it Thanks Here in your code you are testing the regular expression defined with the keycode, so every chearactes on the keyboard will be allowed since the keycode of every