带缓冲效果的下拉菜单效果-导航菜单-点滴吧

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带缓冲效果的下拉菜单效果

更新时间：2015/7/16 9:50:23 下载：6335次

<!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>下拉缓冲</title>
<script>
function fx(el,attr,to){
	el=typeof el=='string'?document.getElementById(el):el;
	if(to>0)el.style.display='block';
	var w=el['offset'+attr.replace(/^(.)/,new Function('return arguments[1].toUpperCase()'))];
	var Int=Math[to-w>0?'ceil':'floor'];
	clearInterval(el.timer);
	el.timer=setInterval(function(){
		w+=Int((to-w)*0.1);
		el.style[attr]=w+'px';
		if(w==to){	 
			if(to==0)el.style.display='none';
			clearInterval(el.timer);
		};	
	},10);
};
window.onload = function (){
	var a=document.getElementById("t1");
	var b=document.getElementById("t2");
	var c=document.getElementById("t3");
        var d=document.getElementById("t4");
	var d1=document.getElementById("div1");
	var d2=document.getElementById("div2");
	var d3=document.getElementById("div3");
	var d4=document.getElementById("div4");
	d1.onmouseover=a.onmouseover=function (){fx('div1','height',300)};
	d1.onmouseout=a.onmouseout=function (){fx('div1','height',0)};
	d2.onmouseover=b.onmouseover=function (){fx('div2','height',300)};
	d2.onmouseout=b.onmouseout=function (){fx('div2','height',0)};
	d3.onmouseover=c.onmouseover=function (){fx('div3','height',300)};
	d3.onmouseout=c.onmouseout=function (){fx('div3','height',0)};
        d4.onmouseover=d.onmouseover=function (){fx('div4','height',300)};
	d4.onmouseout=d.onmouseout=function (){fx('div4','height',0)};	
}
</script>
</head>
<body>
<div id="t1" style=" position:absolute;background:black; left: 579px; top: 34px; width: 149px; height: 35px;"></div>
<div id="div1" style="position:absolute;background:aqua;left:579px;overflow:hidden;top:70px;width:349px;display:none" ></div>
<div id="t2" style=" position:absolute;background:black; left: 0px; top: 34px; width: 149px; height: 35px;"></div>
<div id="div2" style="position:absolute;background:red;left:0px;overflow:hidden;top:70px;width:349px;display:none" ></div>
<div id="t3" style=" position:absolute;background:black; left: 200px; top: 34px; width: 149px; height: 35px;"></div>
<div id="div3" style="position:absolute;background:blue;left:200px;overflow:hidden;top:70px;width:349px;display:none" ></div>

预览效果复制代码保存代码提示：可以先修改部分代码后再运行

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