层展开与关闭-运动缓冲效果
运行代码框
<!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>
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