web scraping javascript

out of the loop, the code after the loop resumes (if any): instancefor (i=0;i{if (i==3){break;}X=x + "The number is" + i + "}Because the IF statement has only one line of code, you can omit the curly braces:for (i=0;i{if (i==3) break;X=x + "The number is" + i + "}Continue statementsThe continue statement interrupts the iteration in the loop, if the specified condition occurs, and then resumes the next iteration in the loop.This example skips the value 3: instancefor (i=0;i{if (i==3) continue;X=

care.2. Open the palette through the Widgets, window, or CTRL+F7, and use your own buttons, label text, input box components to arrange the interface.3, drag out the following interface, set the properties of each component as follows, set its text value, that is, to display the text, set the instance name for the component to be controlled, that is, the ID, such as the button set to Button1, the input box is set to EditField1, For a while, the text value of the label text to be controlled by t

This article illustrates the use of JavaScript for Web node additions and deletions. Share to everyone for your reference. The specific analysis is as follows: I. Basic CONCEPTS This part is called "HTML DOM", the so-called HTML DOM is the Web page load rule, is a rule, that is, the basic formula of Web page composit

-d h:i:s ');Flush ();Sleep (1);};Four, the advantages and disadvantages of web communication methodsPolling, this method should be the least technical content, the most convenient operation, but the timeliness is not strong, the timer of the time interval set short can be slightly eased.Long polling, is a relatively good way of web communication, but each disconnection, compared to the server resources, the

Web communications, a particularly large topic, the cover is also very wide. Because I recently learned some of the web communication knowledge in JavaScript, here's a summary. There should be some understanding of the wrong or unclear expression of the place, but also hope treatise! First, the preface 1. Comet Technology As the foreground of

Javascript|web Web Remote Procedure Call (hereinafter referred to as WEBRPC) is not a refreshing page, under the premise of the remote method calls, is a recent hot spot; In some cases, he even becomes an irreplaceable way of implementation. WEBRPC implementation of the way experienced from the ordinary URL reading, hidden frames, IFrame, XMLHTTP and even flash.

Features of JavaScript scripting language The JavaScript scripting language is a browser-oriented web script programming language. Scripting languages have the following features: 1, in the client implementation. Run completely on the user's computer without having to go through the server. 2, object-oriented. has built-in objects, or you can manipulate the brows

: The information from the Navigator object is misleading and should not be used to detect browser versions because:· Navigator data can be changed by browser user· The browser cannot report a new operating system that is later than the browser publishedBrowser detectionBecause navigator can mislead browser detection, using object detection can be used to sniff out different browsers.Because different browsers support different objects, you can use objects to detect the browser. For example, bec

Recently wrote a chess layout page, because of the need for user interaction, so in different browser interaction, found that in the 360 compatibility Mode page layout is correct, but in Chrome and Firefox is the equivalent of no execution layout of the script, this is why? Later found in Ie10 above the version are not, and later found a variety of methods, and finally discovered that the original is to write JS plus script control div location and size must be added units: that is not to write:

function counter () {var date = new Date (); var = date.getfullyear (); var date2 = new Date (year, 12, 31, 23, 59, 59);/* Turn Change to seconds */var time = (date2-date)/1000;var day = Math.floor (Time/($ *)) var hour = Math.floor (time% (24 * 60 * 6 0)/(*) var minute = Math.floor (time% ($ *)/$), var second = Math.floor (time% (24 * 60 * 6 0%); var str = year + "Years remaining" + Day + "days" + Hour + "when" + Minute + "min" + second + "seconds"; Console.log (str); Window.setinterval ("Count

Below through the JavaScript code to implement the Web page screen backspace event, the input box is not shielded, the specific code is as follows: Document.onkeydown = function (e) { var code; if (!e) {var e = window.event;} if (e.keycode) {code = E.keycode;} else if (E.which) {code = E.which;} BackSpace 8; if ( (Event.keycode = 8) ((event.srcElement.type!= "text" event.src