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Created by Fang on January 16, 2012 19:32:20    Last update: January 16, 2012 19:32:54
You can submit a form via Ajax by the jQuery Form Plugin . There are two main methods: ajaxForm : prepares a form for Ajax submit. Example: $('#myFormId').ajaxForm({ target: ... When the form is submitted, it is sent via Ajax. ajaxSubmit : submit a form via Ajax. Example: $('#myForm2').submit(function() { // i... jQuery Form Plugin is not in the core jQuery API, so you have to include an additional JS file: <head> <script type="text/javascript" ...
Created by James on October 25, 2011 19:44:30    Last update: October 25, 2011 19:45:40
jQuery automatically maps HTML5 custom data attributes to data storage associated with the data() method. Here's an example: <html> <head> <script type="text/javascript"...
Created by James on April 04, 2011 19:41:51    Last update: April 04, 2011 19:41:51
Use the nodeName attribute to get the name of the HTML tag, tagName is not recommended . <!DOCTYPE html> <html> <head> <title>jQu...
Created by James on July 04, 2009 16:30:40    Last update: January 11, 2011 21:21:59
If you are looking for a solution for a progress bar, I direct you to the following resources: Bare Naked App provides a simple and elegant solution based on pure CSS with two images. You control the percentage of completion through the background-position attribute of the CSS. HTML: <img src="/images/percentImage.png" alt="... CSS: img.percentImage { background: white url(/imag... Images: (percentImage.png) (percentImage_back.png) WebAppers extended the above solution with JavaScript. They also added several colored images: JQuery UI has a built-in progress bar widget. However, if you want to get to understand some of the foobar needed to get CSS to work (in general) through this example, stay with me for the rest of this note. Initially I was thinking, a progress bar should be easy: just make...
Created by James on May 24, 2009 20:14:25    Last update: January 11, 2011 20:07:38
In the following HTML code, I attached an inline handler to the text field input and added two event handlers with addEventListener / attachEvent . Both IE and Firefox called the inline handler first. But the order in which the added event handlers were called are different between IE and Firefox (IE calls attached_click2 first). Further, if I add the same event handler multiple times, IE calls the handler the same number of times. But Firefox only calls the same handler once, no matter how many times it was added. <html> <body> <form> Input: <input type="... You can attach an event handler to an HTML element either inline , with JavaScript , or by calling addEventListener (DOM level 2), or attachEvent (IE specific). When you...
Created by James on January 04, 2011 16:22:43    Last update: January 05, 2011 13:43:06
The jQuery doc says: If you wish to use any of the meta-characters (such as !"#$%&'()*+,./:;?@[\]^`{|}~ ) as a literal part of a name, you must escape the character with two backslashes: \\ . So what are these meta-characters ? According to the CSS specification : In CSS, identifiers (including element names, classes, and IDs in selectors) can contain only the characters [a-zA-Z0-9] and ISO 10646 characters U+00A0 and higher, plus the hyphen (-) and the underscore (_); These meta-characters are the printable characters in the ASCII but outside the range allowed by CSS identifiers. They must be escaped, with two backslashes. Why two backslashes? Because one backslash is consumed by JavaScript, and with only one backslash in place, no backslash is passed to jQuery...
Created by James on October 21, 2010 19:48:36    Last update: October 21, 2010 19:50:43
Use the in operator to enumerate over an object's properties: Use the in operator to list all properties of an object Call the hasOwnProperty function to determine if the property is a direct attribute of the current object, i.e., not some attribute defined somewhere up the prototype chain. Test code (copy and paste to the JavaScript Executor ): function BaseClass() { this.p1 = 'parent.p1... Note that intrinsic attributes such as constructor , prototype are not listed by the in operator.
Created by Dr. Xi on January 30, 2009 16:57:12    Last update: January 30, 2009 17:25:36
The scriptable attribute defaults to false . However, even when you set it to true , there is a time delay between when the applet is loaded and when it becomes scriptable . The following code may fail: <html><body> <object classid="clsid:8AD9C840-04... You need to wrap the JavaScript like this: <script language="JavaScript" type="text/javascrip...
Created by Dr. Xi on November 28, 2007 20:20:44    Last update: November 28, 2007 20:20:44
When you want to run some JavaScript when the document loads, you usually set the onload attribute of the <body> tag: <html> <body onload="myHandler();"> <scr... Or, you can use JavaScript to attach the onload handler: <html> <body> <script language="JavaScri... However, this only works in IE, not Firefox. In Firefox, you have to use window.onload = myHandler . // This only works for IE document.body.onl...
Created by Dr. Xi on November 15, 2007 04:40:44    Last update: November 15, 2007 04:40:44
Here's some simple Ajax code. The Ajax response is delivered as XML with attributes and an array of data payloads contained in CDATA sections: <?xml version="1.0" encoding="utf-8"?> <ajax-re... And the JavaScript that does the Ajax magic: // ajax.js function ajaxGet(url, ajaxCallback) ... And the HTML test code: <html> <head> <script language="JavaScript"...
Created by Dr. Xi on August 10, 2007 20:43:10    Last update: August 10, 2007 20:43:10
IE and firefox both support client side XSLT. This can be done by inserting an xml-stylesheet into the XML file, which would trigger the browser to apply the XSL to the XML document and generate a transformed page: <?xml version="1.0" encoding="utf-8" ?> <?... Or, it can be done more dynamically with client side JavaScript. However, IE and FF offer different APIs for XSLT. Below is my attempt to bridge the differences. It's been tested to work for IE 7.0, FF 2.0 and Opera 9.0.2. function XSLT(url) { var xslt = false; ... The following HTML page shows how to use it: <HTML> <HEAD> <SCRIPT language="JavaS...