Javascript实现div的toggle效果小记及其它。
闲着无聊。想起网上经常见过的Toggle效果,虽然网上有不少的代码和类库可以实现。但是还是想自己亲手写写。。。
---今天,终于操起刀来大杀四方-----大言不惭了^_^。
翠花,上酸菜!
当然,由于本厨的手艺有限,导致味道啥的都差了些。。各位见谅了。。
代码中有些东东是多余的或者是重复的。本想精简单一下,但是一想,思路有了就行了。
-------
以下是本次练习中的一些经验:
1、在style.display='none'与style.visibility='hidden'时读取对象的offsetHeight值将会有所不同。
style.display='none'读出来的,将是 0 ,而style.visibility='hidden'时读取的是对象加载时的offsetHeight,比如 108等。
2、style.height的值并不是整型或number型的,别忘了它是有单位的哦:如 "108px"而不是"108",而offsetHeight的值是 108.
3、setTimeout和setInterval
它们都有两种使用方法,以setTimeout为例:
方法一:setTimeout(function,interval,args) 参数一为函数名或匿名函数,参数2为时间间隔,参数3到N是所调用函数的参数,如下例:
setTimeout(function(){alert('1');},1000) setTimeout(GetStr,1000,'McJeremy')
方法二:setTimeout(object,function,interval) 参数一为调用的对象,参数2为对象中的方法,参数3为时间间隔。
有个有趣的东东:
function a()
{
setTimeout(function(){alert('1');},0);
alert('2');
}
----猜输出结果是什么?---答案: 21 ,而不是12哦。这是因为,JS函数执行也像其它编程语言一样有堆栈的。alert('1')因为有setTimeout,所以最后执行。。。不知道我这样理解对不对。
----打完收功。
---今天,终于操起刀来大杀四方-----大言不惭了^_^。
翠花,上酸菜!
1
<script type="text/javascript" language="javascript">
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function $(obj)
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{
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return document.getElementById(obj);
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}
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function ToggleDiv()
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{
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this.ToggleId='silder'; //被伸缩的对象ID
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this.ParentId='container'; //被伸缩的对象的父ID
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this.minHeight=1; //最小高度
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this.maxHeight=200; //最大高度
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this.speed=1; //伸缩速度
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this.offset=0.15; //偏移量
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this.load=function()
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{
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if($(this.ToggleId).style.display=='none') //如果是隐藏的就打开
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{
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StartToggle('open',this.ToggleId,this.ParentId,this.minHeight,this.maxHeight,this.speed,this.offset);
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}
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else //如果是打开的就隐藏
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{
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StartToggle('close',this.ToggleId,this.ParentId,this.minHeight,this.maxHeight,this.speed,this.offset);
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}
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}
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}
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function StartToggle(method,toggleid,parentid,minheight,maxheight,speed,offset)
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{
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if(typeof(method)!='string' || method.toLowerCase()=='')
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{
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method='open';
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}
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if(method.toLowerCase()=='open')
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{
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var addspeed=speed+offset;
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var openfun=function()
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{
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var originheight=$(toggleid).offsetHeight==0?1:$(toggleid).offsetHeight;
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var newheight=originheight+addspeed;
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addspeed=addspeed+offset;
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if(parseInt(newheight)<parseInt(maxheight))
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{
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$(toggleid).style.height=newheight+'px';
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$(toggleid).style.display='block';
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}
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else if(parseInt(newheight)>=parseInt(maxheight))
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{
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$(toggleid).style.height=maxheight+'px';
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$(toggleid).style.display='block';
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$(parentid).innerHTML='收缩';
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window.clearInterval(addtimer);
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}
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}
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var addtimer=window.setInterval(openfun,100);
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}
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else if(method.toLowerCase()=='close')
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{
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var addspeed=speed+offset;
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var reducefunction=function()
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{
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var originheight=$(toggleid).offsetHeight;
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var newheight=originheight-addspeed;
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addspeed=addspeed+offset;
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if(parseInt(newheight)>parseInt(minheight))
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{
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$(toggleid).style.height=newheight+'px';
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$(toggleid).style.display='block';
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}
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else
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{
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$(toggleid).style.display='none';
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$(toggleid).style.height='1px';
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$(parentid).innerHTML='展开';
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window.clearInterval(reducetimer);
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}
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}
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var reducetimer=window.setInterval(reducefunction,100);
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}
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}
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function DoToggle(obj1,obj2)
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{
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var tog=new ToggleDiv();
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tog.ToggleId=obj1;
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tog.ParentId=obj2;
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tog.minHeight=5;
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tog.maxHeight=110;
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tog.speed=10;
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tog.offset=3;
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tog.load();
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}
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</script>
接下来上汤:![](/Images/OutliningIndicators/None.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/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/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/ExpandedSubBlockStart.gif)
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![](/Images/OutliningIndicators/InBlock.gif)
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![](/Images/OutliningIndicators/ExpandedSubBlockEnd.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/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/ExpandedSubBlockStart.gif)
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![](/Images/OutliningIndicators/InBlock.gif)
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![](/Images/OutliningIndicators/ExpandedSubBlockEnd.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/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/ExpandedSubBlockStart.gif)
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![](/Images/OutliningIndicators/InBlock.gif)
43
![](/Images/OutliningIndicators/InBlock.gif)
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![](/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
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![](/Images/OutliningIndicators/InBlock.gif)
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![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
47
![](/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/ExpandedSubBlockEnd.gif)
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![](/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
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![](/Images/OutliningIndicators/InBlock.gif)
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![](/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
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![](/Images/OutliningIndicators/InBlock.gif)
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![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
57
![](/Images/OutliningIndicators/InBlock.gif)
58
![](/Images/OutliningIndicators/InBlock.gif)
59
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
60
![](/Images/OutliningIndicators/InBlock.gif)
61
![](/Images/OutliningIndicators/InBlock.gif)
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![](/Images/OutliningIndicators/InBlock.gif)
63
![](/Images/OutliningIndicators/InBlock.gif)
64
![](/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/ExpandedSubBlockEnd.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)
71
![](/Images/OutliningIndicators/InBlock.gif)
72
![](/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)
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![](/Images/OutliningIndicators/InBlock.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)
82
![](/Images/OutliningIndicators/InBlock.gif)
83
![](/Images/OutliningIndicators/InBlock.gif)
84
![](/Images/OutliningIndicators/InBlock.gif)
85
![](/Images/OutliningIndicators/InBlock.gif)
86
![](/Images/OutliningIndicators/InBlock.gif)
87
![](/Images/OutliningIndicators/InBlock.gif)
88
![](/Images/OutliningIndicators/InBlock.gif)
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![](/Images/OutliningIndicators/ExpandedBlockEnd.gif)
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![](/Images/OutliningIndicators/None.gif)
1
<div style="border:1px dashed blue;width:200px;">
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<h2 id="container" onclick="javascript:DoToggle('silder',this.id);" onmouseover="this.style.cursor='pointer';">展开</h2>
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<div id="silder" style="display:none">
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伸缩效果<br />
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伸缩效果<br />
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伸缩效果<br />
7
伸缩效果<br />伸缩效果<br />
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伸缩效果<br />
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</div>
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</div>
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-------![](/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/None.gif)
7
![](/Images/OutliningIndicators/None.gif)
8
![](/Images/OutliningIndicators/None.gif)
9
![](/Images/OutliningIndicators/None.gif)
10
![](/Images/OutliningIndicators/None.gif)
11
![](/Images/OutliningIndicators/None.gif)
当然,由于本厨的手艺有限,导致味道啥的都差了些。。各位见谅了。。
代码中有些东东是多余的或者是重复的。本想精简单一下,但是一想,思路有了就行了。
-------
以下是本次练习中的一些经验:
1、在style.display='none'与style.visibility='hidden'时读取对象的offsetHeight值将会有所不同。
style.display='none'读出来的,将是 0 ,而style.visibility='hidden'时读取的是对象加载时的offsetHeight,比如 108等。
2、style.height的值并不是整型或number型的,别忘了它是有单位的哦:如 "108px"而不是"108",而offsetHeight的值是 108.
3、setTimeout和setInterval
它们都有两种使用方法,以setTimeout为例:
方法一:setTimeout(function,interval,args) 参数一为函数名或匿名函数,参数2为时间间隔,参数3到N是所调用函数的参数,如下例:
setTimeout(function(){alert('1');},1000) setTimeout(GetStr,1000,'McJeremy')
方法二:setTimeout(object,function,interval) 参数一为调用的对象,参数2为对象中的方法,参数3为时间间隔。
有个有趣的东东:
function a()
{
setTimeout(function(){alert('1');},0);
alert('2');
}
----猜输出结果是什么?---答案: 21 ,而不是12哦。这是因为,JS函数执行也像其它编程语言一样有堆栈的。alert('1')因为有setTimeout,所以最后执行。。。不知道我这样理解对不对。
----打完收功。
<h3>
心静似高山流水不动,心清若巫峰雾气不沾。
</h3>
心静似高山流水不动,心清若巫峰雾气不沾。
</h3>