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Javascript to implement navigation menu effects with a drop-down menu

Source: Internet
Author: User
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Javascript to implement navigation menu effects with a drop-down menu

This example describes how to implement the navigation menu of a menu with a drop-down menu in javascript. Share it with you for your reference. The specific implementation method is as follows:

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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 = UTF-8"/>

<Title> navigation menu with a drop-down menu </title>

<Style type = "text/css">

Body {font-family: Verdana; font-size: 12px; line-height: 1.5 ;}

A {color: #000; text-decoration: none ;}

A: hover {color: # F00 ;}

# Menu {width: 500px; height: 28px; margin: 0 auto; border-bottom: 3px solid # E10001 ;}

# Menu ul {list-style: none; margin: 0px; padding: 0px ;}

# Menu ul li {float: left; margin-left: 2px ;}

# Menu ul li a {display: block; width: 87px; height: 28px; line-height: 28px; text-align: center; font-size: 14px ;}

# Menu ul li a # current {font-weight: bold; color: # fff ;}

# Menu ul li ul {border: 1px solid # ccc; display: none; position: absolute ;}

# Menu ul li {float: none; width: 87px; background: # eee; margin: 0 ;}

# Menu ul li a {background: none ;}

# Menu ul li a: hover {background: #333; color: # fff ;}

# Menu ul li: hover ul {display: block ;}

# Menu ul li. sfhover ul {display: block ;}

</Style>

<Script type = "text/javascript"> <! -- // --> <! [CDATA [//> <! --

Function menuFix (){

Var sfEls = document. getElementById ("menu"). getElementsByTagName ("li ");

For (var I = 0; I <sfEls. length; I ++ ){

SfEls [I]. onmouseover = function (){

This. className + = (this. className. length> 0? "": "") + "Sfhover ";

}

SfEls [I]. onMouseDown = function (){

This. className + = (this. className. length> 0? "": "") + "Sfhover ";

}

SfEls [I]. onMouseUp = function (){

This. className + = (this. className. length> 0? "": "") + "Sfhover ";

}

SfEls [I]. onmouseout = function (){

This. className = this. className. replace (new RegExp ("(? | ^) Sfhover \ B "),

"");

}

}

}

Window. onload = menuFix;

// --> <!]>

</Script>

</Head>

<Body>

<Div id = "menu">

<Ul>

<Li> <a id = "current" href = "#"> homepage </a> </li>

<Li> <a href = "#"> webpage layout </a>

<Ul>

<Li> <a href = "#"> adaptive width </a> </li>

<Li> <a href = "#"> fixed width </a> </li>

</Ul>

</Li>

<Li> <a href = "#"> web tutorial </a>

<Ul>

<Li> <a href = "#"> getting started </a> </li>

<Li> <a href = "#"> video tutorial </a> </li>

<Li> <a href = "#"> FAQs </a> </li>

</Ul>

</Li>

<Li> <a href = "#"> web instance </a> </li>

<Li> <a href = "#"> Common Code </a> </li>

</Ul>

</Div>

</Body>

</Html>

I hope this article will help you design javascript programs.

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