JavaScript

Note:Lexical scope: the scope of a variable is determined during definition rather than execution. That is to say, the lexical scope depends on the source code and can be determined through static analysis. Therefore, the lexical scope is also

Date. parse (dateVal)This method is very common. For example, you can use it to verify whether the input date exists. If it is a non-existent date, the return value will be NaN, in addition, it can be used to compare the order of two dates or

Then there are several events on the page that dynamically add DOM elements. For example, clicking a layer will list the details of this layer, so there is no problem in FF and chrome, but in the IE6-8 every time re-layout.For example, when I drag a

Copy codeThe Code is as follows:DEMO code: [Ctrl + A select all Note: If you need to introduce external Js, You need to refresh it to execute]Source: http://www.cnblogs.com/airy

Copy codeThe Code is as follows:// Import the js FileFunction getResult (url, ready ){Var xmlHttp;Var r = function (){If (xmlHttp. readyState = 4 ){If (xmlHttp. status = 200 ){// Alert (isIE );Var xmlstr;Var xmldoc;Var isIE = !! (Window. attachEvent

I. Prototype And ConstructorAll functions of Js have a prototype attribute, which references an object (prototype. This function includes constructor and common function. We are talking about the prototype of the constructor, but we cannot deny that

The following functions must be implemented:(1) move the mouse over the link text in the article. A prompt box is displayed at the corresponding position. The style of the prompt box is controlled by css and the height is adaptive. You can click the

However, IE6 can use two lines of JS Code, and IE7 and above are similar, but a security prompt is disgusting. If you see it, you must be skeptical;But Firefox and Chrome won't let you copy them;I remember that I had this code on the Internet. I

Copy codeThe Code is as follows: Untitled Note: 1. The following testCss1 and testCss2 styles are the same as testCss. Only the size is set.2. the height and width of the red part must be defined, which is the height and width of the parent layer

*Determines whether the specified content is null. If it is null, a warning box is displayed.*/Function isEmpty (theValue, strMsg ){If (theValue = ""){Alert (strMsg + "cannot be blank! ");Return true;}Return false;}/*Chinese judgment function, which

If you only need to perform operations on the DOM, there is no need to wait until all the pages are loaded. We need a faster method.Firefox has a DOMContentLoaded event that can be easily solved. Unfortunately, IE does not.MSDN's method of JSCRIPT

After reading this article in detail, you can optimize it for a long time. Most of the JS optimization methods cannot be separated from these three methods. (The total page size is 155.k, and JS accounts for 100.3 K) It's time to optimize JS. There

Rounding in decimal format These two sections of code help you round the list and show the price or order more useful for you:Code 1:Copy codeThe Code is as follows:Function CurrencyFormatted (amount ){Var I = parseFloat (amount );If (isNaN (I) {I =

1. Only numbers and English letters can be entered:2. Only numbers can be entered:3. Only the fullwidth fields can be entered:4. Only Chinese characters can be

Plugin description-JBox is a jQuery-based multi-function dialog box plug-in that can achieve the overall style of the website and give users a new visual experience.Running Environment-Compatible with mainstream browsers such as IE6 +, Firefox,

In this article, the author introduces seven different JavaScript syntaxes in IE and Firefox. 1. CSS "float" ValueThe most basic syntax for accessing a given CSS value is: object. style. property, replace the value with a connector using the camper

I. Brief IntroductionYesterday, a support Colleague helped her customer achieve the following results (automatically completed ): I used to call the real estate dictionary when I searched for the house: This is a small feature and a large feature.

IsNaN Function Returns a Boolean value indicating whether the provided value is a reserved value NaN (not a number ).NaN: Not a NumberIsNaN (numValue)The required numvalue parameter is the value to check whether it is NAN.Description If the value is

I have read many JavaScript projects on the Internet, and the objects used are in the form:For example, jQuery and TinyMCE all have the following shapes:Copy codeThe Code is as follows:Var Dialog ={Int: function (){....},Insert: function

Copy codeThe Code is as follows:/*** Clone element styles* @ Param {HTMLElement} the cloned Element* @ Param {Boolean} whether to enable cache (true by default)* @ Return {String} css Class Name*/Var cloneStyle = (function (doc ){Var rstyle =/^