Implementation of javascript perfect drag

Source: Internet
Author: User

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 !!!

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.