JavaScript

1. always with the frame 9. prevent a person from being frame Web pages will not be saved as Look at the Web page source code onclick= "window.location =" View-source: "+" http://www.pconline.com.cn "" > Confirmation at deletion Delete

Sometimes we use the framework to make a new page open in the IFRAME, and look at the detailed code below.

In JS we have to judge that a string appears in another string, using IndexOf to look at its syntax Stringobject.indexof (Searchvalue,fromindex) ParametersStrobjRequired option. A string object or text.SubstringRequired option. The substring to

LastIndexOf Method: Returns the last occurrence of the substring of a string object. Stringobject.lastindexof (Searchvalue,fromindex)ParametersStrobjRequired option. A string object or text.SubstringRequired option. The substring to find within

* Following IE instead of Internet Explorer to Mf/ff instead of Mozzila Firefox/ Window.eventie: there are window.event objectsFF: no Window.event object. You can pass an event object to a parameter of a function. such as

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Object Properties Document.title//Set document title equivalent to HTML title tagDocument.bgcolor//Set page background colorDocument.fgcolor//Set foreground colors (text color)Document.linkcolor//not-clicked link colorDocument.alinkcolor//Activate

Quote from Wikipedia: A quine is a computer program, it does not accept any input, and the only output is its own source code. @cowboy (Ben Alman) gives a quine program written in javascript:!function $ () {Console.log ('! ') +$+ ' () ')}

Reproduced in: http://jiangzhengjun.iteye.com/blog/458869JavaScript decimal When doing arithmetic, the accuracy will be lost, this will cause a lot of inconvenience in the project, first see the following script: According to the normal calculation,

If you want to check whether a key was inside an Object or Array, you can use the ' in ':Object:const obj = { 'graphql', false}; Console.log ('name'in// trueconsole.log ( ' title ' inch // falseArray:ConstCharacters = [ 'Harry Potter', 'Ron

Script Loading and runningWhen a browser encounters a the defer property indicates that the script contained in the element does not intend to modify the DOM, so the code can be executed later. The corresponding JavaScript file will "Hight

JSONP is the JSON with Padding. Due to the limitations of the same-origin policy, XMLHttpRequest only allows resources to be requested for the current source (domain name, protocol, port). If cross-domain requests are made, we can make cross-domain

HTML tag and htmldl tag A definition list: Computer the instrument used for calculation... display devices that display information visually...   Effect:A definition list: Computer The instrument used for calculation ......

HTML target and htmltargetDefinition and usage the target attribute of a tag specifies where to open the link document. If a tag contains a target attribute, the browser loads and displays the documents in the framework or window named by the href

Div, span, divspan 1. Html block elements HTML can combine elements through and Most HTML elements are definedBlock-level elementsOrInline Element, When a block-level element is displayed in a browser, it usually starts (or ends) with a new line ).

Tip: you can modify some code before running Tip: you can modify some code before running

Tip: you can modify some code before running Go to the JavaScript website Tip: you can modify some code before running

Tip: you can modify some code before running Multi-row text box that can be stretched/shortened与之间-->与之间--> Tip: you can modify some code before running

Tip: you can modify some code before running Filter effect: Tip: you can modify some code before running

Tip: you can modify some code before running Javascript + div pop-up Layer CodeDear user:×1. The first Chinese WEB station provides you with professional knowledgeThe first stop of Chinese WEB will provide you with professional knowledgeThe first