JavaScript Common Usage Summary _ basics

Source: Internet
Author: User
Tags setinterval
JS decoding and Coding-html
Copy Code code as follows:

<! DOCTYPE html>
<meta http-equiv= "Con Tent-type "content=" text/html; Charset=utf-8 "/>
<title>javascript encoding and decoding </title>
<script type=" Text/javascript ">

function Gel (id) {
return document.getElementById (ID);
}

Window.onload = function () {
//alert (document.getElementById ("Span1"). InnerHTML
Gel ("Btn1"). onclick = function () {
Alert (encodeURI Gel ("Span1"). InnerHTML));
};

Gel ("btn2"). onclick = function () {
Alert (decodeURI (Gel ("Span1"). InnerHTML));
};
};
</script>
<body>
<span id= "Span1" > Crazy han san xiong up!</span>
<inp UT type= "button" id= "BTN1" value= "encoded"/>
<input type= "button" id= "Btn2" value= "after decoding"/>
</body>

Use of SetInterval and settimeout in JS. html
Copy Code code as follows:

<! DOCTYPE html>
<meta http-equiv= "Content-type" content= "text/html; Charset=utf-8 "/>
Use of SetInterval and settimeout in <title>js </title>
<script type= "Text/javascript" >
var time = 10;
var id = 0;
function Gel (ID) {
return document.getElementById (ID);
}

function Dectime () {
if (Time > 0) {
time--;
Gel ("TimeSpan"). InnerHTML = time;
} else {
Clear the hour hand
Clearinterval (ID);
}
}

Window.onload = function () {
id = setinterval (dectime, 1000);
};
</script>
<body>
<span > Countdown <span id= "TimeSpan" style= "color:red" ></span> sec </span>
</body>

JS Check whether the input is a number. html
Copy Code code as follows:

<! DOCTYPE html>
<meta http-equiv= "Content-type" content= "text/html; Charset=utf-8 "/>
<TITLE>JS Check whether the input is digital </title>
<script type= "Text/javascript" >



window.onload= function () {
document.getElementById ("Btn1"). onclick = function () {
var i = prompt ("Enter the value to be judged");
Window.alert (i);
if (!isnan (i)) {
Window.alert ("is a number");
} else {
Window.alert ("Not a number");
}
};
}
</script>
<body>
<input type= "button" id= "BTN1" value= "Judge number"/>
</body>

JS dynamically gets, creates, and deletes nodes. html
Copy Code code as follows:

<! DOCTYPE html>
<meta http-equiv= "Content-type" content= "text/html; Charset=utf-8 "/>
<title>js dynamically acquire, create, and delete nodes </title>
<script type= "Text/javascript" >
function Gel (ID) {return document.getElementById (ID);}

Window.onload = function () {
Gel ("Btnproadd"). onclick = function () {
Add child nodes under Prolist
var linew = document.createelement ("Li");
linew.innerhtml = Prompt ("Enter the province to be added");
Gel ("Prolist"). AppendChild (linew);
Re-bind all click Delete Events
Dellionclick ();
};

Double-click the Li child node to delete it

function Dellionclick () {
1. Get all the child nodes first
var linodes = Gel ("Prolist"). ChildNodes;

for (var i = 0; i < linodes.length; i++) {
Linodes[i].onclick = function () {
Alert (Linodes[i]). innerhtml;//because the onclick bound is an anonymous function, so I'll always be 7 here.
Here is the correct deletion method, using this. Because the OnClick event is always triggered by your chosen li.
This.parentNode.removeChild (this);
};
}
}


};
</script>
<body>
<ul id= "Prolist" >
<li> Shanxi </li>
<li> Henan </li>
<li> Beijing </li>
</ul>

<input type= "button" value= "New province" id= "Btnproadd"/>
</body>

Use of SetInterval and settimeout in JS. html

Copy Code code as follows:

<! DOCTYPE html>
<meta http-equiv= "Content-type" content= "text/html; Charset=utf-8 "/>
Use of SetInterval and settimeout in <title>js </title>
<script type= "Text/javascript" >
var time = 10;
var id = 0;
function Gel (ID) {
return document.getElementById (ID);
}

function Dectime () {
if (Time > 0) {
time--;
Gel ("TimeSpan"). InnerHTML = time;
} else {
Clear the hour hand
Clearinterval (ID);
}
}

Window.onload = function () {
id = setinterval (dectime, 1000);
};
</script>
<body>
<span > Countdown <span id= "TimeSpan" style= "color:red" ></span> sec </span>
</body>

JS dynamically add table data. html
Copy Code code as follows:

<! DOCTYPE html>
<meta http-equiv= "Content-type" content= "text/html; Charset=utf-8 "/>
<title> Add table Data dynamically </title>

<script type= "Text/javascript" >

var Mailarr = [
{"title": "A C # problem", "name": "John", "date": "2014-03-21"},
{"title": "A JavaScript problem", "name": "Dick", "date": "2014-03-21"},
{"title": "A C Problem", "name": "55", "date": "2014-03-21"},
{"title": "A C + + problem", "name": "Zhao Liu", "date": "2014-03-21"}
];

Window.onload = function () {
var tab = document.getElementById ("TB");
The Mailarr loop traversal method is added to the table in a TR manner
for (var rowindex = 0; rowindex < mailarr.length; rowindex++) {
var tr = document.createelement ("tr");
var Th1 = document.createelement ("th");
var Th2 = document.createelement ("th");
var th3 = document.createelement ("th");
var Th4 = document.createelement ("th");
th1.innerhtml = "<input type= ' checkbox '/>";
th2.innerhtml = Mailarr[rowindex].title;
th3.innerhtml = Mailarr[rowindex].name;
th4.innerhtml = mailarr[rowindex].date;

Tr.appendchild (Th1);
Tr.appendchild (Th2);
Tr.appendchild (TH3);
Tr.appendchild (TH4);

Tab.appendchild (TR);
}

};
</script>

<body>
<table id= "TB" border= "1px;" style= "border-collapse:collapse;" >
<tr>
<th> Series </th>
<th> title </th>
<th> Email Person </th>
<th> Sending Time </th>
</tr>
<!--cycle increased-->
</table>
</body>

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.