Home > Developer > JavaScript

Implementation of javascript perfect drag

Source: Internet
Author: User
Developer on Alibaba Coud: Build your first app with APIs, SDKs, and tutorials on the Alibaba Cloud. Read more ＞

HTML code:
Copy codeThe Code is as follows:
<! Doctype html>
<Html lang = "en-US">
<Head>
<Meta charset = "UTF-8">
<Title> </title>
<Link rel = "stylesheet" href = "style.css"/>
<Script type = "text/javascript" src = "drag. js"> </script>
<Script type = "text/javascript" src = "demo. js"> </script>
</Head>
<Body>
<Div id = "login">
<H2> website logon <Div class = "user">
Username: <input type = "text" name = "user" class = "txt"/>
</Div>
<Div class = "pass">
Password: <input type = "password" name = "pass" class = "txt"/>
</Div>
<Div class = "submit">
<Input type = "submit" value = "login" class = "button"/>
</Div>
</Div>
</Body>
</Html>

CSS code:
Copy codeThe Code is as follows:
Body, h2 {
Margin: 0;
Padding: 0;
}
# Login {
Width: 350px;
Height: 250px;
Border: 1px solid # ccc;
Position: absolute;
Left: 512px;
Top: 300px;
}
# Login h2 {
Font-size: 14px;
Text-align: center;
Height: 30px;
Line-height: 30px;
Background: # f60;
Color: white;
Cursor: move;
Margin-bottom: 30px;
Letter-spacing: 1px;
}
# Login. user, # login. pass {
Text-align: center;
Font-size: 12px;
Height: 60px;
Line-height: 40px;
}
# Login. txt {
Width: 200px;
Border: 1px solid # ccc;
Background: # fff;
Height: 30px;
Line-height: 30px;
}
# Login. submit {
Text-align: right;
}
# Login. button {
Width: 100px;
Height: 30px;
Background: # 06f;
Border: none;
Cursor: pointer;
Margin: 10px 30px;
Color: white;
Letter-spacing: 1px;
Font-weight: bold;
}

Drag the core code:
Copy codeThe Code is as follows:
Function drag (obj ){
If (typeof obj = 'string '){
Var obj = document. getElementById (obj );
} Else {
Var obj = obj;
}
Function fixEvent (event ){
Event.tar get = event. srcElement;
Event. preventDefault = fixEvent. preventDefault;
Return event;
}
FixEvent. preventDefault = function (){
This. returnValue = false;
};
Obj. onmousedown = mousedown;
Function mousedown (e ){
Var e = e | fixEvent (window. event );
Var disX = e. clientX-obj. offsetLeft;
Var disY = e. clientY-obj. offsetTop;
If (e.tar get. tagName = 'h2 '){
Document. onmousemove = move;
Document. onmouseup = up;
} Else {
Document. onmousemove = null;
Document. onmouseup = null;
}
Function move (e ){
Var e = e | fixEvent (window. event );
Var left = e. clientX-disX;
Var top = e. clientY-disY;
If (obj. setCapture ){
Obj. setCapture ();
}
If (left <0 ){
Left = 0;
} Else if (left> document.doc umentElement. clientWidth-obj. offsetWidth ){
Left = document.doc umentElement. clientWidth-obj. offsetWidth;
}
If (top <0 ){
Top = 0;
} Else if (top> document.doc umentElement. clientHeight-obj. offsetHeight ){
Top = document.doc umentElement. clientHeight-obj. offsetHeight;
}
Obj. style. left = left + 'px ';
Obj. style. top = top + 'px ';
Return false;
};
Function up (){
If (obj. releaseCapture ){
Obj. releaseCapture ();
}
Document. onmousemove = null;
Document. onmouseup = null;
}
};
}

Call code:
Copy codeThe Code is as follows:
Window. onload = function (){
Var login = document. getElementById ('login ');
Drag (login );
};

Thank you for your criticism !!!

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

Related Keywords:
javascript treeview drag and drop implementation of data structures find perfect square of number what example of perfect square implementation of ajax in php comparison of master data management implementation styles partial implementation of interface in java

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.

What's Trending
Top 10 Tags
datastax versions naming convention zookeeper client class definition md5 microsoft sql server 2005 data structures exception handling error handling
Top 10 Keywords
microsoft download center down wordpress address url site address url wordpress address url windows installer 4 0 download 302 not found web address url definition site address url wordpress db2 integer mac os installation step by step pdf abbreviation for return

A Free Trial That Lets You Build Big!

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

Get Started for Free

  • Sales Support

    1 on 1 presale consultation

    Chat Contact Sales

  • After-Sales Support

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

    Open a Ticket

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

    Learn More