![](/Images/OutliningIndicators/None.gif)
2。增加样式表(可不添加任何样式):
![](/Images/OutliningIndicators/ExpandedBlockStart.gif)
3。添加js脚本:
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//标题栏的自动浮动效果
2
var oldTop = 0;
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var trs;
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var arrTrs = new Array();
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function onScroll()
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{
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if(arrTrs && arrTrs.length > 0)
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{
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for(var i = 0; i < arrTrs.length; i++)
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{
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var arr = arrTrs[i];
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var top = (document.documentElement && document.documentElement.scrollTop) ?
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document.documentElement.scrollTop : document.body.scrollTop;
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if( (top > arr[0].offsetTop || arr[1] < arr[0].offsetTop) &&
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top < arr[2])
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{
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arr[0].style.top = top;
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}
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}
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}
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}
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function load ()
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{
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//获取可浮动表头列表
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var trs = document.getElementsByClassName("flowtitle");
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if(trs && trs.length > 0)
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{
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for(var i = 0; i < trs.length; i++)
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{
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var tr = trs[i];
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tr.style.position = "absolute";
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var arr = new Array(2);
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arr[0] = tr;
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arr[1] = tr.offsetTop;//alert(tr.offsetTop+"|"+tr.parentNode.offsetHeight);
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arr[2] = tr.offsetTop + tr.parentNode.offsetHeight;
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arrTrs[i] = arr;
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}
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}
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}
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window.onscroll = onScroll;
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window.onload = load;
![](/Images/OutliningIndicators/None.gif)
2
![](/Images/OutliningIndicators/None.gif)
3
![](/Images/OutliningIndicators/None.gif)
4
![](/Images/OutliningIndicators/None.gif)
5
![](/Images/OutliningIndicators/None.gif)
6
![](/Images/OutliningIndicators/ExpandedBlockStart.gif)
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![](/Images/OutliningIndicators/InBlock.gif)
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![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
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![](/Images/OutliningIndicators/InBlock.gif)
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![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
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![](/Images/OutliningIndicators/InBlock.gif)
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![](/Images/OutliningIndicators/InBlock.gif)
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![](/Images/OutliningIndicators/InBlock.gif)
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![](/Images/OutliningIndicators/InBlock.gif)
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![](/Images/OutliningIndicators/InBlock.gif)
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![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
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![](/Images/OutliningIndicators/InBlock.gif)
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![](/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
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![](/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
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![](/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
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![](/Images/OutliningIndicators/ExpandedBlockEnd.gif)
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![](/Images/OutliningIndicators/None.gif)
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![](/Images/OutliningIndicators/ExpandedBlockStart.gif)
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![](/Images/OutliningIndicators/InBlock.gif)
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![](/Images/OutliningIndicators/InBlock.gif)
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![](/Images/OutliningIndicators/InBlock.gif)
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![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
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![](/Images/OutliningIndicators/InBlock.gif)
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![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
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![](/Images/OutliningIndicators/InBlock.gif)
31
![](/Images/OutliningIndicators/InBlock.gif)
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![](/Images/OutliningIndicators/InBlock.gif)
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![](/Images/OutliningIndicators/InBlock.gif)
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![](/Images/OutliningIndicators/InBlock.gif)
35
![](/Images/OutliningIndicators/InBlock.gif)
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![](/Images/OutliningIndicators/InBlock.gif)
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![](/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
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![](/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
39
![](/Images/OutliningIndicators/ExpandedBlockEnd.gif)
40
![](/Images/OutliningIndicators/None.gif)
41
![](/Images/OutliningIndicators/None.gif)
代码略解:
window.onscroll = onScroll;
window.onload = load; //增加事件
load函数负责初始化可浮动表头对象的列表
load里面的:
arr[0] = tr; //表头对象
arr[1] = tr.offsetTop;// 表头原始位置
arr[2] = tr.offsetTop + tr.parentNode.offsetHeight;//表格底部的位置
tr.style.position = "absolute";//设置表头样式为浮动。 必须!否则不会有任何效果!
onScroll 里面负责处理滚动事件。
if( (top > arr[0].offsetTop || arr[1] < arr[0].offsetTop) &&
top < arr[2])
{
arr[0].style.top = top;
}
//上面这句最重要。判断条件 不明白的话,慢慢琢磨吧
ok,就这么简单。。但效果很酷酷的啦