本文实例讲述了javascript简单实现滑动菜单效果的方法。分享给大家供大家参考。具体如下：
整个javascript代码共42行，其中主要函数Slide代码26行,可以改进哦！
<!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>滑动菜单</title><style>a,body,div,h1,h2,li,ul{ margin:0; padding:0}a{display:block;text-decoration:none;height:25px;color:#456;background-color:#ABC;cursor:pointer;}a:hover{color:#123;background-color:#789;font-weight:bold;}body{ font:12px/18px "Times New Roman",Times,"宋体",serif; text-align:center;}h1{ height:100px; width:25px; position:absolute; top:-1px; left:123px; cursor:pointer; color:#89A; font-size:18px; line-height:50px; background-color:#234;}h2{ height:24px; font-size:12px; border-bottom:1px solid #4C6CB9; color:#BBB; font-weight:600; cursor:pointer;}li{height:25px;list-style:none}#Container{width:800px;background-color:#DDD;border: 1px solid #999;margin:10px auto}#Top{height:30px;background-color:#DDD;border: 1px solid #999;}#Logo{height:100px;background-color:#DDD;border: 1px solid #999;}#Nav{height:30px;background-color:#DDD;border: 1px solid #999;}#SideBar{ position:fixed!important; position:absolute; top:200px; left:0px;}#SideBar a,#SideBar h2,#SideBar li,#SideBar ul{width:120px}#Main{height:800px;background-color:#DDD;border: 1px solid #999;}#Footer{height:60px;background-color:#DDD;border: 1px solid #999;}.Extracted{width:0px;}.Extrended{border:1px solid #555;background-color:#000;padding:1px}</style></head><body><div id="Container"> <div id="Top">顶条</div> <div id="Logo">Logo</div> <div id="Nav">导航条</div> <div id="SideBar" class="Extrended"> <h1>菜单</h1> <ul> <h2>功能栏1</h2> <li><a href="">功能1</a></li> <li><a href="">功能2</a></li> <li><a href="">功能3</a></li> <li><a href="">功能4</a></li> <li><a href="">功能5</a></li> </ul> <ul> <h2>功能栏2</h2> <li><a href="">功能1</a></li> <li><a href="">功能2</a></li> <li><a href="">功能3</a></li> <li><a href="">功能4</a></li> <li><a href="">功能5</a></li> </ul> <ul> <h2>功能栏3</h2> <li><a href="">功能1</a></li> <li><a href="">功能2</a></li> <li><a href="">功能3</a></li> <li><a href="">功能4</a></li> <li><a href="">功能5</a></li> </ul> <ul> <h2>功能栏4</h2> <li><a href="">功能1</a></li> <li><a href="">功能2</a></li> <li><a href="">功能3</a></li> <li><a href="">功能4</a></li> <li><a href="">功能5</a></li> </ul> <ul> <h2>功能栏5</h2> <li><a href="">功能1</a></li> <li><a href="">功能2</a></li> <li><a href="">功能3</a></li> <li><a href="">功能4</a></li> <li><a href="">功能5</a></li> </ul> <ul> <h2>功能栏6</h2> <li><a href="">功能1</a></li> <li><a href="">功能2</a></li> <li><a href="">功能3</a></li> <li><a href="">功能4</a></li> <li><a href="">功能5</a></li> </ul> </div> <div id="Main">内容区</div> <div id="Footer">底条</div></div><script type="text/javascript">function $(e){return document.getElementById(e)}function Slide(Element,Mod){ var LongthMax,LongthMin,Property,Count=25,Accum,ID,Dlt,DltDlt; if(Mod){ Property='left'; LongthMax=0; LongthMin=-124; } else{ Property='height'; LongthMax=Element.children.length*25; LongthMin=25; } DltDlt=(LongthMax-LongthMin)/(Count*5); if(Element.style[Property]==LongthMax+'px')DltDlt=-DltDlt; Accum=parseInt(Element.style[Property]); Dlt=7*DltDlt; ID=setInterval(function(){ if(Count--){ if(!(Count%5))Dlt-=DltDlt; Accum+=Dlt; Element.style[Property]=Math.floor(Accum)+'px'; return } clearInterval(ID); Element.style[Property]=(DltDlt>0)? LongthMax+'px':LongthMin+'px'; },20);}$('SideBar').style.left='0px';$('SideBar').children[0].onclick=function(){ Slide(this.parentNode,1);};(function(Menu,i,tmp){ Menu=document.getElementsByTagName('ul'); for(i=Menu.length;i--;){ tmp=Menu[i]; tmp.style.overflow='hidden'; tmp.style.height='25px'; tmp.children[0].onclick=function(){ Slide(this.parentNode,0); }; }}());</script></body></html>希望本文所述对大家的javascript程序设计有所帮助。
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