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Js implements very simple focus chart switching special effect instances

Source: Internet
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Js implements very simple focus chart switching special effect instances

This article mainly introduces js's implementation of very simple focus chart switching special effects. It is a very simple js focus chart switching effect, involving javascript mouse events and image-related skills, for more information, see

This is a very simple focus chart (more like a sliding door) for beginners to learn from.

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<! DOCTYPE html PUBLIC "-// W3C // dtd xhtml 1.0 Transitional // EN"

Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd>

<Html xmlns = "http://www.w3.org/1999/xhtml">

<Head>

<Meta http-equiv = "Content-Type" content = "text/html; charset = gb2312"/>

<Title> untitled document </title>

<Style type = "text/css">

* {Margin: 0; padding: 0 ;}

Ul, li {list-style: none ;}

. Mid {margin: 0 auto ;}

. Area {

Width: 240px; height: 270px;

Overflow: hidden; background: #999;

Margin-top: 150px; position: relative;

}

# Pic_list {

Position: relative;

}

# Pic_list li {

Position: absolute; visibility: hidden;

}

# Pic_list li. show {

Visibility: visible;

}

# Pic_list li img {

Vertical-align: middle;

}

. Button {

Width: 240px; height: 20px;

Line-height: 20px; background: # ccc;

Position: absolute; bottom: 0px;

}

# Button {

Float: right;

}

# Button li {

Float: left; width: 20px; height: 20px;

Text-align: center; margin: 0 3px;

Font-family: "Arial"; font-size: 12px;

Color: # fff; background: #000;

}

# Button li. current {

Background: # f00; cursor: pointer;

}

</Style>

</Head>

<Body>

<Div class = "area mid">

<Div id = "imgbox" class = "bbbb">

<Ul id = "pic_list" class = "aaaa">

<Li class = "show" id = "one">

</Li>

<Li id = "two">

</Li>

<Li id = "three">

</Li>

<Li id = "four">

</Li>

<Li id = "five">

</Li>

</Ul>

</Div>

<Div class = "button" class = "dddd">

<Ul id = "button" class = "cccc">

<Li class = "current" id = "but_one"> 1 </li>

<Li id = "but_two"> 2 </li>

<Li id = "but_three"> 3 </li>

<Li id = "but_four"> 4 </li>

<Li id = "but_five"> 5 </li>

</Ul>

</Div>

</Div>

<Script type = "text/javascript">

(Function (){

Var imgbox = document. getElementById ("imgbox ");

Var pic_list = document. getElementById ("pic_list ");

Var pics = pic_list.getElementsByTagName ("li ");

Var button = document. getElementById ("button"). getElementsByTagName ("li ");

Var p;

Var start;

Function autoplay (start) {for (I = start; I <button. length; I ++ ){

// Set the start value to the start parameter.

(Function (){

Var p = I;

// Assign the I. I value to p equal to 0, 1, 2, 3, 4;

Button [I]. onmouseover = function change (){

// Button [0], button [1], button [2], button [3], button [4]

// Onmouseover can trigger a function;

For (j = 0; j <this. parentNode. childNodes. length; j ++ ){

// Start with this (the element of the current trigger event), all the child nodes of the parent node

// The length value is the highest value to start traversing .;

This. parentNode. childNodes [j]. className = "";

// Start with this (the element of the current trigger event)

// The className of all child nodes of the parent node is empty. Dangerous and use with caution .;

}

This. className = "current ";

// This. That is, the className of the element currently triggering onmouseover is "current ";

For (m = 0; m <pics. length; m ++ ){

// Traverse pics with the maximum value of pics. length .;

Pics [m]. className = "";

// Clear the className of all elements in the pics array;

If (m = p ){

// When m = p (p = I) SO m = I, the following function is triggered

Pics [m]. className = "show ";

// The className value of the mth element of pics is show; m is equal to I here;

}

}

}

})();

}

}

Autoplay (0 );

})();

</Script>

</Body>

</Html>

I hope this article will help you design javascript programs.

Note <>: For more exciting tutorials, please pay attention to the help house programming

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.

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