利用javascirpt我们可以很容易的在HTML中实现树,而不需要使用ASP,JSP,PHP等等编写动态程序,当然如果要和数据库结合,下面的代码也很容易移植。
首先,我们看一下实现这个树形结构的javascript代码。
(本文来源于图老师网站,更多请访问http://m.tulaoshi.com/webkaifa/) common.js
以下是引用片段:
!--
function showCurrentSection()
{
var objCurrentSection = document.getElementById("navcurrentsection");
if (objCurrentSection != null)
{
objCurrentSection.style.display = "block";
objCurrentSection.parentElement.childNodes[0].className = "open";
if (objCurrentSection.parentElement.parentElement.nodeName == "UL")
showSection(objCurrentSection.parentElement.parentElement);
}
}
function showSection(objSection)
{
objSection.style.display = "block";
objSection.parentElement.childNodes[0].className = "open";
if (objSection.parentElement.parentElement != null && objSection.parentElement.parentElement.nodeName == "UL")
showSection(objSection.parentElement.parentElement);
}
--
下面是实现树的静态HTML文件,很简单的啊。
example1.html
以下是引用片段:
!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" xml:lang="en" lang="en"
head
titleCurrent Tree Node Opener/title
meta http-equiv="content-type" content="text/html; charset=iso-8859-1" /
link rel="stylesheet" href="tree.css" type="text/css" media="screen" /
meta http-equiv="expires" content="-1" /
meta http-equiv="pragma" content="no-cache" /
meta name="robots" content="none" /
meta name="rating" content="all" /
meta name="author" content="Bluegrass Technologies" /
meta name="email" content="paulw@bluegrassgroup.com" /
script language="javascript" type="text/javascript" src="common.js"/script
/head
body onload="showCurrentSection();"
ul id="menu"
lia href="a.htm"Section 1/a/li
lia href=""Section 2/a
ul
lia href=""Section 2.1/a/li
lia href=""Section 2.2/a/li
lia href=""Section 2.3/a
ul id="navcurrentsection"
lia href=""Section 2.3.1/a/li
lia href=""Section 2.3.2/a/li
/ul
/li
lia href=""Section 2.4/a/li
/li
lia href=""Section 3/a/li
/ul
/body
/html
下面是树的样式表
tree.css
body
{
font-family: Verdana, Arial, Sans-Serif;
font-size: small;
background-color: #ffffff;
}
ul#menu
{
border: solid 1px #333333;
border-top-width: 15px;
padding: 10px;
padding-top: 6px;
margin: 0px;
width: 200px;
}
ul#menu li
{
margin: 0px;
list-style-type: none;
border: solid 1px #ffffff;
}
ul#menu li ul
{
margin: 0px 0px 0px 15px;
display: none;
}
ul#menu li a
{
background-image: url(closed.gif);
background-repeat: no-repeat;
background-position: 0px 4px;
text-indent: 15px;
display: block;
text-decoration: none;
color: #333333;
}
ul#menu li a:hover
{
color: #000000;
background-color: #eeeeee;
background-image: url(open.gif);
}
好了,到这里为止,我们已经实现了这个树,大家不妨亲自演示一下。
(本文来源于图老师网站,更多请访问http://m.tulaoshi.com/webkaifa/)