Prompt IsNaN Array function DOM window.open/close/location/history

1, the use of prompt

<%@ Page language="C #"autoeventwireup="true"codefile="Default.aspx.cs"inherits="_default"%><! DOCTYPE html>"http://www.w3.org/1999/xhtml">"Server"><meta http-equiv="Content-type"Content="text/html; Charset=utf-8"/> <title></title>"Form1"runat="Server"> <div> <asp:label id="Label1"runat="Server"text="Label"></asp:Label> <asp:button id="Button1"runat="Server"text="Button"/> </div> </form></body>document.getElementById ("Button1"). onclick = function ()//Button1 Click events    {        varA = prompt ("Please enter the content");//accept the contents of the prompt value to adocument.getElementById ("Label1"). InnerHTML = A;//assign a value to Label1        return false;//prevents page refreshes. Without this, the page will go back to what it was like when the page was first loaded.    }</script>

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2, JS in the combination of digital and text output results

<script>document.getElementById ("Button1"). onclick = function ()//Button1 Click events    {        varA ="Ten"; varb = -; varc = -; Alert (A+ B + c);//back to 102030Alert (b + C + a);//5010Alert (b + A + c);//201030Alert (parseint (a) + B);//Output 30, note the parseint () methodAlert (b.tostring () +a);//OutputAlert (b +""+C);//output 2030, pay attention to the middle "".    }

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3, JS guarantee text box only number (IsNaN ())

<%@ Page language="C #"autoeventwireup="true"codefile="Default.aspx.cs"inherits="_default"%><! DOCTYPE html>"http://www.w3.org/1999/xhtml">"Server"><meta http-equiv="Content-type"Content="text/html; Charset=utf-8"/> <title></title>"Form1"runat="Server"> <div> <asp:label id="Label1"runat="Server"text="Label"></asp:Label> <asp:button id="Button1"runat="Server"text="Button"/> <asp:textbox id="TextBox1"runat="Server"></asp:TextBox> </div> </form></body>document.getElementById ("TextBox1"). onkeyup =function () {if(IsNaN ( This. Value))//"Not a pure number?" True means "not a number", false means a number        {             This. Value = This. VALUE.SUBSTR (0, This. value.length-1);//the value of the text box retains only the number part        }    }</script>

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4, JS under for (I in "AAA") {alert (i);}

<%@ Page language="C #"autoeventwireup="true"codefile="Default.aspx.cs"inherits="_default"%><! DOCTYPE html>"http://www.w3.org/1999/xhtml">"Server"><meta http-equiv="Content-type"Content="text/html; Charset=utf-8"/> <title></title>"Form1"runat="Server"> <div> <asp:label id="Label1"runat="Server"text="Label"></asp:Label> <asp:button id="Button1"runat="Server"text="Button"/> <asp:textbox id="TextBox1"runat="Server"></asp:TextBox> </div> </form></body>document.getElementById ("Button1"). onclick =function () {varA ="ASDFG";  for(Iincha) {alert (i);//pops up all index numbers of a 0,1,2,3,4        }           }</script>

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5, JS under the establishment of the array, add and take value var al = new Array (); Number of arrays with length

<script>    document.getElementById (function  ()    {        varNew Array (); // create an array of JS, equivalent to a set of C #, unlimited length, unlimited data types        Al[0] = 1; // adding data        to an array AL[1] = "2"; // adding data        to an array var b = al[1]; // take one of the values   in the array     }</script>

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6, JS functions function () {}

<script>         functions aaa (A, B)//AAA is the function name A, B is the parameter to be added as required, do not limit the data type of AB         alert (// EXECUTE statement        // according to the specific situation to see if there is a need to Rerurn, there is on the written, no thanks.      }    function bbbb ( )// functions with no parameters bbb    {    Execute statement    }</script>

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7.DOM Get element mode

 <script> var  a = document.getElementById ("id value"); //  get an element by ID, get an element  var  b = Document.getelementsbyclassname ("class value"); //     Gets a bunch of elements by class, returns a collection  var  C = document.getElementsByTagName ("element name"); //     get a bunch of elements by element name, return a collection  //  What is the element name? such as div img span input, note that the button is not  var  d = document.getelementsbyname ("Name value" ); //     obtained by name, gets a bunch of elements, returns a collection, name is the  used for the server. //  After the two in practice is not practical, the two implementation of the effect, the first two can be achieved, and more prepared  </script> 
 

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8, window.open () of the parameters

<script>window.open ("Page.html", "_blank", "height=100, width=400, Top=0, left=0, Toolbar=no, Menubar=no, Scrollbars=no, Resizable=no, Location=no, Status=no ")//the sentence is written in a line of code    //parameter explanation:    //window.open the command that pops up the new window;    //the filename of the ' page.html ' pop-up window;    //' _blank ' popup D to the new empty window    //height=100 window height;    //width=400 window width;    //the pixel value of the Top=0 window from the top of the screen;    //the pixel value of the left=0 window from the left side of the screen;    //Toolbar=no whether the toolbar is displayed, yes is displayed;    //Menubar,scrollbars represents the menu bar and scroll bar.     //resizable=no Whether the window size is allowed to change, yes is allowed;    //Location=no Whether the address bar is displayed, yes is allowed;    //Status=no Whether the information in the status bar is displayed (usually the file is already open), yes is allowed;</script>

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9, Window.history

<script>    window.history.back (); // back to an interface    Window.history.forward (); // Move on to an interface    Window.history.go (n); // n is of type int, 1 means backward one interface, 1 means moving forward one interface </script>

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10, Window.location.href

<script>    var a = window.location.href;   Gets the address of the current page    window.location.href ("http://www.baidu.com");   only on this page to reopen the Baidu page, if you want to open a new page, you must use window.open (); </script

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Finish!!

Prompt IsNaN Array function DOM window.open/close/location/history