层展开与关闭-运动缓冲效果

  • 作者:佚名 来源:互联网 文章点击数:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh-CN" lang="zh-CN">
<head>
<title>层展开/关闭 - 运动缓冲效果</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<meta name="keywords" content="展开,关闭,运动缓冲,效果,javascript,封装" />
<meta name="description" content="展开/关闭 - 运动缓冲效果" />
<meta name="copyright" content="Copyright 2008 XQin.cn" />
<meta name="author" content="小秦" />
<script type="text/javascript">
/*
    函数名称: Scroll
    Scroll(obj, h, s)
    参数说明:
        obj,[object]  id值或对象.     必需
          h,[height]  展开后的高度.   可选(默认为200px)
          s,[speed]   展开速度,值越小展开速度越慢. 可选(默认为1.2){建议取值为1.1到2.0之间[例如:1.17]}.
    函数返回值:
        true    展开(对象的高度等于展开后的高度)
        false   关闭(对象的高度等于原始高度)
*/
function Scroll(obj, h, s){
    if(obj == undefined){return false;}
    var h = h || 200;
    var s = s || 1.2;
    var obj = typeof(obj)=="string"?document.getElementById(obj):obj;
    var status = obj.getAttribute("status")==null;
    var oh = parseInt(obj.offsetHeight);
    obj.style.height = oh;
    obj.style.display = "block";
 obj.style.overflow = "hidden";
    if(obj.getAttribute("oldHeight") == null){
        obj.setAttribute("oldHeight", oh);
    }else{
        var oldH = Math.ceil(obj.getAttribute("oldHeight"));
    }
    var reSet = function(){
        if(status){
            if(oh < h){
                oh = Math.ceil(h-(h-oh)/s);
                obj.style.height = oh+"px";
            }else{
                obj.setAttribute("status",false);
                window.clearInterval(IntervalId);
            }
        }else{
            obj.style.height = oldH+"px";
            obj.removeAttribute("status");
            window.clearInterval(IntervalId);
        }
    }
    var IntervalId = window.setInterval(reSet,10);
 return status;
}
window.onload= function(){
    document.getElementById("detail").onclick = function(){
        Scroll("detail", 300, 1.3);
    }
    document.getElementById("text").onclick = function(){
        Scroll("text");
    }
}
</script>
</head>
<body>
<p id="detail" style="border:1px dashed #f00;">这是一个段落啦!!哇哈哈哈<br/>点我一下下啦:)</p>
<div id="text" style="border:1px solid #0f0">Hello World!<br/>你敢点我不  -_|||</div>
<button onclick="Scroll("text", 400, 1.2)">Hello World</button>
</body>
</html>

Tags:运动缓冲 Javascript 特效

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