javascript 小技巧收集

最新推荐文章于 2024-08-29 21:31:38 发布

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本文汇总了大量实用的JavaScript技巧和代码片段，涵盖了事件处理、DOM操作、表单验证、页面特效等多个方面，为前端开发者提供了丰富的参考资源。

事件源对象
event.srcElement.tagName
event.srcElement.type

捕获释放event.srcElement.setCapture();
event.srcElement.releaseCapture();

事件按键
event.keyCode
event.shiftKey
event.altKey
event.ctrlKey

事件返回值
event.returnValue

鼠标位置event.x
event.y

窗体活动元素document.activeElement

绑定事件
document.captureEvents(Event.KEYDOWN);

访问窗体元素document.all("txt").focus();
document.all("txt").select();

窗体命令
document.execCommand

窗体COOKIE document.cookie

菜单事件
document.oncontextmenu

创建元素document.createElement("SPAN");

根据鼠标获得元素：document.elementFromPoint(event.x,event.y).tagName=="TDdocument.elementFromPoint(event.x,event.y).appendChild(ms)

窗体图片
document.images[索引]

窗体事件绑定document.onmousedown=scrollwindow;

元素
document.窗体.elements[索引]

对象绑定事件document.all.xxx.detachEvent("onclick",a);

插件数目
navigator.plugins

取变量类型typeof($js_libpath) == "undefined"

下拉框下拉框.options[索引]
下拉框.options.length

查找对象
document.getElementsByName("r1");
document.getElementById(id);

定时timer=setInterval("scrollwindow()",delay);
clearInterval(timer);

UNCODE编码escape() ,unescape

父对象
obj.parentElement(dhtml)
obj.parentNode(dom)

交换表的行TableID.moveRow(2,1)

替换CSS
document.all.csss.href = "a.css";

并排显示
display:inline

隐藏焦点hidefocus=true

根据宽度换行style="word-break:break-all"

自动刷新<meta HTTP-EQUIV="refresh"CONTENT="8;URL=http://c98.yeah.net">

简单邮件<a href="mailto:aaa@bbb.com?subject=ccc&body=xxxyyy">

快速转到位置obj.scrollIntoView(true)

锚<a name="first">
<a href="#first">anchors</a>

网页传递参数location.search();

可编辑obj.contenteditable=true

执行菜单命令
obj.execCommand

双字节字符
/[^x00-xff]/
汉字
/[u4e00-u9fa5]/

让英文字符串超出表格宽度自动换行
word-wrap: break-word; word-break: break-all;

透明背景
<IFRAME src="1.htm" width=300 height=180 allowtransparency></iframe>

获得style内容obj.style.cssText

HTML标签
document.documentElement.innerHTML

第一个style标签
document.styleSheets[0]

style标签里的第一个样式
document.styleSheets[0].rules[0]

防止点击空链接时，页面往往重置到页首端。<a href="javascript:function()">word</a>

上一网页源
asp:
request.servervariables("HTTP_REFERER")
javascript:
document.referrer

释放内存CollectGarbage();

禁止右键
document.oncontextmenu = function() { return false;}

禁止保存
<noscript><iframe src="*.htm"></iframe></noscript>

禁止选取<bodyoncontextmenu="return false" ondragstart="return false" onselectstart ="return false" onselect="document.selection.empty()" oncopy="document.selection.empty()" onbeforecopy="return false"onmouseup="document.selection.empty()>

禁止粘贴
<input type=text onpaste="return false">

地址栏图标
<link rel="Shortcut Icon" href="favicon.ico">
favicon.ico 名字最好不变16*16的16色,放虚拟目录根目录下

收藏栏图标
<link rel="Bookmark" href="favicon.ico">

查看源码
<input type=button value=查看网页源代码 onclick="window.location= "view-source:"+ "http://www.youkuaiyun.com/"">

关闭输入法
<input style="ime-mode:disabled">

自动全选
<input type=text name=text1 value="123" onfocus="this.select()">

ENTER键可以让光标移到下一个输入框<inputonkeydown="if(event.keyCode==13)event.keyCode=9">

文本框的默认值<input type=text value="123"onfocus="alert(this.defaultValue)">

title换行obj.title = "123&#13sdfs&#32"

获得时间所代表的微秒var n1 = new Date("2004-10-10".replace(/-/g,"/")).getTime()

窗口是否关闭win.closed

checkbox扁平<input type=checkboxstyle="position: absolute; clip:rect(5px 15px 15px 5px)"><br>

获取选中内容document.selection.createRange().duplicate().text

自动完成功能<input type=text autocomplete=on>打开该功能
<input type=text autocomplete=off>关闭该功能

窗口最大化
<body onload="window.resizeTo(window.screen.width - 4,window.screen.height-50);window.moveTo(-4,-4)">

无关闭按钮IEwindow.open("aa.htm","meizz", "fullscreen=7");

统一编码/解码alert(decodeURIComponent(encodeURIComponent("http://你好.com?as= hehe")))
encodeURIComponent对":"、"/"、";" 和 "?"也编码

表格行指示<tr onmouseover="this.bgColor="#f0f0f0""onmouseout="this.bgColor="#ffffff"">

//各种尺寸

s += " 网页可见区域宽："+ document.body.clientWidth;
s += " 网页可见区域高："+ document.body.clientHeight;
s += " 网页可见区域高："+ document.body.offsetWeight +" (包括边线的宽)";
s += " 网页可见区域高："+ document.body.offsetHeight +" (包括边线的宽)";
s += " 网页正文全文宽："+ document.body.scrollWidth;
s += " 网页正文全文高："+ document.body.scrollHeight;
s += " 网页被卷去的高："+ document.body.scrollTop;
s += " 网页被卷去的左："+ document.body.scrollLeft;
s += " 网页正文部分上："+ window.screenTop;
s += " 网页正文部分左："+ window.screenLeft;
s += " 屏幕分辨率的高："+ window.screen.height;
s += " 屏幕分辨率的宽："+ window.screen.width;
s += " 屏幕可用工作区高度："+ window.screen.availHeight;
s += " 屏幕可用工作区宽度："+ window.screen.availWidth;

//过滤数字

<input type=text onkeypress="returnevent.keyCode>=48&&event.keyCode<=57||(this.value.indexOf(".")<0?event.keyCode==46:false)" onpaste="return !clipboardData.getData("text").match(/D/)" ondragenter="return false">

//特殊用途

//不缓存

//正则匹配匹配中文字符的正则表达式： [u4e00-u9fa5]
匹配双字节字符(包括汉字在内)：[^x00-xff]
匹配空行的正则表达式： [s| ]*
匹配HTML标记的正则表达式：/<(.*)>.*</1>|<(.*)/>/
匹配首尾空格的正则表达式：(^s*)|(s*$)（像vbscript那样的trim函数）
匹配Email地址的正则表达式：w+([-+.]w+)*@w+([-.]w+)*.w+([-.]w+)*
匹配网址URL的正则表达式：http://([w-]+.)+[w-]+(/[w-./?%&=]*)?
以下是例子：
利用正则表达式限制网页表单里的文本框输入内容：
用正则表达式限制只能输入中文：onkeyup="value=value.replace(/[^u4E00-u9FA5]/g,"")" onbeforepaste="clipboardData.setData("text",clipboardData.getData("text").replace(/[^u4E00-u9FA5]/g,""))"
1.用正则表达式限制只能输入全角字符： onkeyup="value=value.replace(/[^uFF00-uFFFF]/g,"")" onbeforepaste="clipboardData.setData("text",clipboardData.getData("text").replace(/[^uFF00-uFFFF]/g,""))"
2.用正则表达式限制只能输入数字：onkeyup="value=value.replace(/[^d]/g,"")"onbeforepaste="clipboardData.setData("text",clipboardData.getData("text").replace(/[^d]/g,""))"
3.用正则表达式限制只能输入数字和英文：onkeyup="value=value.replace(/[W]/g,"")"onbeforepaste="clipboardData.setData("text",clipboardData.getData("text").replace(/[^d]/g,""))"

//消除图像工具栏

//无提示关闭

functionClose()
{
varua=navigator.userAgent
varie=navigator.appName=="Microsoft Internet Explorer"?true:false
if(ie)
{
      varIEversion=parseFloat(ua.substring(ua.indexOf("MSIE ")+5,ua.indexOf(";",ua.indexOf("MSIE"))))
if(IEversion<5.5)
{
   varstr = "<object id=noTipCloseclassid="clsid:ADB880A6-D8FF-11CF-9377-00AA003B7A11">"
       str += "<param name="Command" value="Close"></object>";
       document.body.insertAdjacentHTML("beforeEnd", str);
       document.all.noTipClose.Click();
}
      else
{
       window.opener =null;
       window.close();
      }
   }
else
{
window.close()
   }
}

//取得控件得绝对位置(1)

//获得控件的绝对位置(2)

oRect = obj.getBoundingClientRect();
oRect.left
oRect.

//最小化,最大化,关闭

//光标停在文字最后

//页面进入和退出的特效

进入页面<metahttp-equiv="Page-Enter" content="revealTrans(duration=x,transition=y)">
推出页面<meta http-equiv="Page-Exit" content="revealTrans(duration=x,transition=y)">
这个是页面被载入和调出时的一些特效。duration表示特效的持续时间，以秒为单位。transition表示使
用哪种特效，取值为1-23:
0 矩形缩小
1 矩形扩大
2 圆形缩小
3 圆形扩大
4 下到上刷新
5 上到下刷新
6 左到右刷新
7 右到左刷新
8 竖百叶窗
9 横百叶窗
10 错位横百叶窗
11 错位竖百叶窗
12 点扩散
13 左右到中间刷新
14 中间到左右刷新
15 中间到上下
16 上下到中间
17 右下到左上
18 右上到左下
19 左上到右下
20 左下到右上
21 横条
22 竖条
23

//网页是否被检索

//打印分页

//设置打印

//自带的打印预览

WebBrowser.ExecWB(1,1)打开
Web.ExecWB(2,1) 关闭现在所有的IE窗口，并打开一个新窗口
Web.ExecWB(4,1) 保存网页
Web.ExecWB(6,1) 打印
Web.ExecWB(7,1) 打印预览
Web.ExecWB(8,1) 打印页面设置
Web.ExecWB(10,1) 查看页面属性
Web.ExecWB(15,1) 好像是撤销，有待确认
Web.ExecWB(17,1) 全选
Web.ExecWB(22,1) 刷新
Web.ExecWB(45,1) 关闭窗体无提示
<style media=print>
.Noprint{display:none;}
.PageNext{page-break-after: always;}
</style>
<object id="WebBrowser" width=0 height=0 classid="CLSID:8856F961-340A-11D0-A96B-00C04FD705A2">
</object>

<center class="Noprint" >
<input type=button value=打印 onclick=document.all.WebBrowser.ExecWB(6,1)>
<input type=button value=直接打印 onclick=document.all.WebBrowser.ExecWB(6,6)>
<input type=button value=页面设置 onclick=document.all.WebBrowser.ExecWB(8,1)>
</p>
<p> <input type=button value=打印预览 onclick=document.all.WebBrowser.ExecWB(7,1)>
</center>

//去掉打印时的页眉页脚

//浏览器验证

functioncheckBrowser()
{
   this.ver=navigator.appVersion
   this.dom=document.getElementById?1:0
   this.ie6=(this.ver.indexOf("MSIE6")>-1 && this.dom)?1:0;
   this.ie5=(this.ver.indexOf("MSIE5")>-1 && this.dom)?1:0;
   this.ie4=(document.all&& !this.dom)?1:0;
   this.ns5=(this.dom&& parseInt(this.ver) >= 5) ?1:0;
   this.ns4=(document.layers&& !this.dom)?1:0;
   this.mac=(this.ver.indexOf("Mac")> -1) ?1:0;
   this.ope=(navigator.userAgent.indexOf("Opera")>-1);
   this.ie=(this.ie6|| this.ie5 || this.ie4)
   this.ns=(this.ns4|| this.ns5)
   this.bw=(this.ie6|| this.ie5 || this.ie4|| this.ns5 || this.ns4|| this.mac || this.ope)
   this.nbw=(!this.bw)
   returnthis;
}

//计算内容宽和高

<SCRIPT language="javascript">
function test(obj)
{
       var range = obj.createTextRange();
       alert("内容区宽度: " + range.boundingWidth
                                                + "px 内容区高度: " + range.boundingHeight + "px");

}
</SCRIPT>
<BODY>
<Textarea id="txt" height="150">sdf</textarea><INPUT type="button" value="计算内容宽度" onClick="test(txt)">
</BODY>

//无模式的提示框

functionmodelessAlert(Msg)
{
window.showModelessDialog("javascript:alert(""+escape(Msg)+"");window.close();","","status:no;resizable:no;help:no;dialogHeight:height:30px;dialogHeight:40px;");
}

//屏蔽按键

<html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=gb2312">
<noscript><meta http-equiv="refresh" content="0;url=about:noscript"></noscript>
<title>屏蔽鼠标右键、Ctrl+N、Shift+F10、Alt+F4、F11、F5刷新、退格键</title>
</head>
<body>
<script language="Javascript"><!--
//屏蔽鼠标右键、Ctrl+N、Shift+F10、F11、F5刷新、退格键
//Author: meizz(梅花雨) 2002-6-18
functiondocument.oncontextmenu(){event.returnValue=false;}//屏蔽鼠标右键
functionwindow.onhelp(){returnfalse} //屏蔽F1帮助
functiondocument.onkeydown()
{
if ((window.event.altKey)&&
      ((window.event.keyCode==37)||   //屏蔽 Alt+ 方向键←
       (window.event.keyCode==39)))   //屏蔽 Alt+ 方向键→
{
     alert("不准你使用ALT+方向键前进或后退网页！");
     event.returnValue=false;
}
     /* 注：这还不是真正地屏蔽 Alt+ 方向键，
     因为 Alt+ 方向键弹出警告框时，按住 Alt 键不放，
     用鼠标点掉警告框，这种屏蔽方法就失效了。以后若
     有哪位高手有真正屏蔽 Alt 键的方法，请告知。*/
if ((event.keyCode==8) ||                 //屏蔽退格删除键
      (event.keyCode==116)||                 //屏蔽 F5 刷新键
      (event.ctrlKey && event.keyCode==82)){//Ctrl+ R
     event.keyCode=0;
     event.returnValue=false;
     }
if (event.keyCode==122){event.keyCode=0;event.returnValue=false;} //屏蔽F11
if (event.ctrlKey &&event.keyCode==78) event.returnValue=false;   //屏蔽 Ctrl+n
if (event.shiftKey &&event.keyCode==121)event.returnValue=false; //屏蔽 shift+F10
if (window.event.srcElement.tagName== "A" && window.event.shiftKey)
      window.event.returnValue = false;             //屏蔽 shift加鼠标左键新开一网页
if ((window.event.altKey)&&(window.event.keyCode==115))             //屏蔽Alt+F4
{
      window.showModelessDialog("about:blank","","dialogWidth:1px;dialogheight:1px");
      returnfalse;
}
}
</script>
屏蔽鼠标右键、Ctrl+N、Shift+F10、Alt+F4、F11、F5刷新、退格键
</body>
</html>

//屏蔽打印
<style>
@media print{
* {display:none}
}
</style>

//移动的图层，拖动

1.<span style="position:absolute;width:200;height:200;background:red"onmousedown=MouseDown(this) onmousemove=MouseMove()onmouseup=MouseUp()>meizz</span>
<script language=javascript>
varObj;
functionMouseDown(obj)
{
Obj=obj;
Obj.setCapture();
Obj.l=event.x-Obj.style.pixelLeft;
Obj.t=event.y-Obj.style.pixelTop;
}
functionMouseMove()
{
if(Obj!=null)
{
    Obj.style.left = event.x-Obj.l;
    Obj.style.top = event.y-Obj.t;
}
}
functionMouseUp()
{
if(Obj!=null)
{
    Obj.releaseCapture();
    Obj=null;
}
}
</script>
2.
<div id="myDiv" src="logo.gif" ondrag="doDrag();" onmouseover="this.style.cursor="hand"" style="position:absolute;left=100;top=100;" onmousedown="doMouseDown();">
<a href="#" onclick="return false"><h1>wlecome</h1></a>
</div>
<script language="JavaScript" type="text/javascript">
varorgMouseX;
varorgMouseY;
varorgObjX;
varorgObjY;
functiondoDrag()
{
varmyObject=document.all.myDiv;

var x=event.clientX;
var y=event.clientY;
myObject.style.left=x-(orgMouseX-orgObjX);
myObject.style.top=y-(orgMouseY-orgObjY);

}
functiondoMouseDown()
{
orgMouseX=event.clientX;
orgMouseY=event.clientY;
orgObjX=parseInt(document.all.myDiv.style.left);
orgObjY=parseInt(document.all.myDiv.style.top);
}

</script>

//文档状态改变

//刷新后不变的文本框

<HTML>
<HEAD>
<META NAME="save" CONTENT="history">
<STYLE>
.sHistory {behavior:url(#default#savehistory);}
</STYLE>
</HEAD>
<BODY>
<INPUT class=sHistory type=text id=oPersistInput>
</BODY>
</HTML>

//访问剪贴板

(1)拖拽访问
event.dataTransfer.setData("URL", oImage.src);
sImageURL = event.dataTransfer.getData("URL")
(2)普通访问
window.clipboardData.setData("Text",oSource.innerText);
window.clipboardData.getData("Text");

//操作COOKIE

functionSetCookie(sName, sValue)
{
document.cookie = sName + "=" +escape(sValue) + "; ";
}
functionGetCookie(sName)
{
varaCookie = document.cookie.split("; ");
for (var i=0;i < aCookie.length; i++)
{

varaCrumb = aCookie[i].split("=");
if (sName== aCrumb[0])
returnunescape(aCrumb[1]);
}

}
functionDelCookie(sName)
{
document.cookie = sName + "=" + escape(sValue) + ";expires=Fri, 31 Dec 1999 23:59:59 GMT;";
}

//setTimeout增加参数

//自定义的apply,call

Function.prototype.apply = function (obj, argu) {
if (obj) obj.constructor.prototype._caller = this;
var argus = newArray();
for (var i=0;i<argu.length;i++)
argus[i] = "argu[" + i + "]";
var r;
eval("r =" + (obj ? ("obj._caller(" + argus.join(",") + ");") : ("this(" + argus.join(",") + ");")));
return r;
};
Function.prototype.call = function (obj) {
var argu = newArray();
for (var i=1;i<arguments.length;i++)
argu[i-1] = arguments[i];
returnthis.apply(obj, argu);
};

//下载文件

//检验连接是否有效

//POST代替FORM

<SCRIPT language="VBScript">
Function URLEncoding(vstrIn)
    strReturn = ""
    For i = 1 To Len(vstrIn)
        ThisChr = Mid(vStrIn,i,1)
        If Abs(Asc(ThisChr)) < &HFFThen
            strReturn = strReturn & ThisChr
        Else
            innerCode = Asc(ThisChr)
          If innerCode < 0 Then
                innerCode = innerCode + &H10000
            End If
            Hight8 = (innerCode And &HFF00) &HFF
            Low8 = innerCode And &HFF
            strReturn = strReturn & "%" & Hex(Hight8) & "%" &Hex(Low8)
        End If
    Next
    URLEncoding = strReturn
End Function
Function bytes2BSTR(vIn)
    strReturn = ""
    For i = 1 To LenB(vIn)
        ThisCharCode = AscB(MidB(vIn,i,1))
        If ThisCharCode < &H80Then
            strReturn = strReturn & Chr(ThisCharCode)
        Else
            NextCharCode = AscB(MidB(vIn,i+1,1))
            strReturn = strReturn & Chr(CLng(ThisCharCode)* &H100 + CInt(NextCharCode))
            i = i + 1
        End If
    Next
    bytes2BSTR = strReturn
End Function
dim strA,oReq
strA = URLEncoding("submit1=Submit&text1=中文")
set oReq = CreateObject("MSXML2.XMLHTTP")
oReq.open "POST","http://ServerName/VDir/TstResult.asp",false
oReq.setRequestHeader "Content-Length",Len(strA)
oReq.setRequestHeader "CONTENT-TYPE","application/x-www-form-urlencoded"
oReq.send strA
msgbox bytes2BSTR(oReq.responseBody)
</SCRIPT>

//readyState是xmlhttp返回数据的进度，0=载入中,1=未初始化,2=已载入,3=运行中,4=完成

//组件是否安装
isComponentInstalled("{6B053A4B-A7EC-4D3D-4567-B8FF8A1A5739}", "componentID"))

//检查网页是否存在

functionCheckURL(URL)
{
varxmlhttp = newActiveXObject("Microsoft.XMLHTTP");
xmlhttp.Open("GET",URL,false);
try
{
    xmlhttp.Send();
    varresult = xmlhttp.status;
}
catch(e){return(false);}
if(result==200)
{
    returntrue;
}
xmlhttp = null;
returnfalse;
}

//连接数据库

//使用数据岛

<html>
<body>
srno：<input type=text datasrc=#xmldate DataFLD=srno size="76"><BR>
times：<input type=text datasrc=#xmldate DataFLD=times size="76"><BR>
<input id="first" TYPE=button value="<<　第一条记录" onclick="xmldate.recordset.moveFirst()">
<input id="prev" TYPE=button value="<上一条记录" onclick="xmldate.recordset.movePrevious()">
<input id="next" TYPE=button value="下一条记录>" onclick="xmldate.recordset.moveNext()">
<input id="last" TYPE=button value="最后一条记录>>" onclick="xmldate.recordset.moveLast()">
<input id="Add" TYPE=button value="添加新记录" onclick="xmldate.recordset.addNew()">

<XML ID="xmldate">
<infolist>
<info ><srno>20041025-01</srno><times>null</times></info>
<info ><srno>20041101-09</srno><times>2004年10月1日2点22分0秒</times></info>
</infolist>
</XML>
</body>
</html>

//获得参数

<body>
<a href="javascript:location.href=location.href +"?a=1&b=2"">search</a>
<script language="JavaScript">

</script>
</body>

//可编辑SELECT

//设置光标位置

functiongetCaret(textbox)
{
varcontrol = document.activeElement;
textbox.focus();
varrang = document.selection.createRange();
rang.setEndPoint("StartToStart",textbox.createTextRange())
control.focus();
returnrang.text.length;
}
functionsetCaret(textbox,pos)
{
try
{
var r=textbox.createTextRange();
   r.moveStart("character",pos);
   r.collapse(true);
   r.select();
}
catch(e)
{}
}
functionselectLength(textbox,start,len)
{
try
{
var r=textbox.createTextRange();

r.moveEnd("character",len-(textbox.value.length-start));
r.moveStart("character",start);

r.select();
}
catch(e)
{//alert(e.description)}
}
functioninsertAtCaret(textbox,text)
{
textbox.focus();
document.selection.createRange().text = text;
}

//页内查找

functionfindInPage(str)
{
vartxt, i, found,n = 0;
if (str== "")
{
returnfalse;
}
txt = document.body.createTextRange();
for (i = 0; i <= n && (found =txt.findText(str)) != false; i++)
{
txt.moveStart("character", 1);
txt.moveEnd("textedit");
}
if (found)
{
txt.moveStart("character", -1);
txt.findText(str);
txt.select();
txt.scrollIntoView();
n++;
}
else
{
if (n> 0)
{
   n = 0;
   findInPage(str);
}
else
{
   alert(str + "...            您要找的文字不存在。   请试着输入页面中的关键字再次查找！");
}
}
returnfalse;
}

//书

http://www.itpub.net/attachment.php?s=&postid=1894598
http://www.wrclub.net/down/listdown.aspx?id=1341//操作EXECL

//自定义提示条

<a href="#" title="这是提示">tip</a>
<script Language="JavaScript">
//***********默认设置定义.*********************
tPopWait=50;//停留tWait豪秒后显示提示。
tPopShow=5000;//显示tShow豪秒后关闭提示
showPopStep=20;
popOpacity=99;
//***************内部变量定义*****************
sPop=null;
curShow=null;
tFadeOut=null;
tFadeIn=null;
tFadeWaiting=null;
document.write("<style type="text/css"id="defaultPopStyle">");
document.write(".cPopText { background-color: #F8F8F5;color:#000000; border:1px #000000 solid;font-color: font-size: 12px; padding-right: 4px; padding-left:4px; height: 20px; padding-top: 2px; padding-bottom: 2px; filter: Alpha(Opacity=0)}");
document.write("</style>");
document.write("<div id="dypopLayer" style="position:absolute;z-index:1000;"class="cPopText"></div>");

functionshowPopupText(){
var o=event.srcElement;
MouseX=event.x;
MouseY=event.y;
if(o.alt!=null &&o.alt!=""){o.dypop=o.alt;o.alt=""};
if(o.title!=null &&o.title!=""){o.dypop=o.title;o.title=""};
if(o.dypop!=sPop){
sPop=o.dypop;
clearTimeout(curShow);
clearTimeout(tFadeOut);
clearTimeout(tFadeIn);
clearTimeout(tFadeWaiting);
if(sPop==null ||sPop=="") {
dypopLayer.innerHTML="";
dypopLayer.style.filter="Alpha()";
dypopLayer.filters.Alpha.opacity=0;
}
else {
if(o.dyclass!=null) popStyle=o.dyclass
elsepopStyle="cPopText";
curShow=setTimeout("showIt()",tPopWait);
}
}
}
functionshowIt(){
dypopLayer.className=popStyle;
dypopLayer.innerHTML=sPop;
popWidth=dypopLayer.clientWidth;
popHeight=dypopLayer.clientHeight;
if(MouseX+12+popWidth>document.body.clientWidth)popLeftAdjust=-popWidth-24
elsepopLeftAdjust=0;
if(MouseY+12+popHeight>document.body.clientHeight)popTopAdjust=-popHeight-24
elsepopTopAdjust=0;
dypopLayer.style.left=MouseX+12+document.body.scrollLeft+popLeftAdjust;
dypopLayer.style.top=MouseY+12+document.body.scrollTop+popTopAdjust;
dypopLayer.style.filter="Alpha(Opacity=0)";
fadeOut();
}
functionfadeOut(){
if(dypopLayer.filters.Alpha.opacity<popOpacity){
dypopLayer.filters.Alpha.opacity+=showPopStep;
tFadeOut=setTimeout("fadeOut()",1);
}
else {
dypopLayer.filters.Alpha.opacity=popOpacity;
tFadeWaiting=setTimeout("fadeIn()",tPopShow);
}
}
functionfadeIn(){
if(dypopLayer.filters.Alpha.opacity>0){
dypopLayer.filters.Alpha.opacity-=1;
tFadeIn=setTimeout("fadeIn()",1);
}
}
document.onmouseover=showPopupText;
</script>

//插入文字

document.onclick =function(){
var oSource = window.event.srcElement;
if(oSource.tagName!="DIV")
returnfalse;
var sel = document.selection;
if (sel!=null) {
var rng = sel.createRange();
if (rng!=null)
rng.pasteHTML("<font color=red>插入文字</font>");
}
}

//netscapte下操作xml

doc = newActiveXObject("Msxml2.DOMDocument");
doc = newActiveXObject("Microsoft.XMLDOM")
->>
doc = (new DOMParser()).parseFromString(sXML,"text/xml")

//判断键值

<html>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<head>
<script language="javascript">
var ie =navigator.appName=="MicrosoftInternet Explorer"?true:false;

function keyDown(e)
{
if(!ie)
{
var nkey=e.which;
var iekey="现在是ns浏览器";
var realkey=String.fromCharCode(e.which);
}
if(ie)
{
var iekey=event.keyCode;
var nkey="现在是ie浏览器";
var realkey=String.fromCharCode(event.keyCode);
if(event.keyCode==32){realkey="" 空格""}
if(event.keyCode==13){realkey="" 回车""}
if(event.keyCode==27){realkey="" Esc""}
if(event.keyCode==16){realkey="" Shift""}
if(event.keyCode==17){realkey="" Ctrl""}
if(event.keyCode==18){realkey="" Alt""}
}
alert("ns浏览器中键值:"+nkey+" "+"ie浏览器中键值:"+iekey+" "+"实际键为"+realkey);
}
document.onkeydown = keyDown;
</script>
</head>
<body>
//Javascript Document.
<hr>
<center>
<h3>请按任意一个键。。。。</h3>
</center>
</body>
</html>

//禁止FSO

1.注销组件
regsvr32 /u scrrun.dll
2.修改PROGID
HKEY_CLASSES_ROOTScripting.FileSystemObject
Scripting.FileSystemObject
3.对于使用object的用户，修改HKEY_CLASSES_ROOTScripting.

//省略号

<DIV STYLE="width: 120px; height: 50px;border: 1px solid blue;
overflow: hidden; text-overflow:ellipsis">
<NOBR>就是比如有一行文字，很长，表格内一行显示不下.</NOBR>
</DIV>

//检测mediaplay版本

<IE:clientCaps ID="oClientCaps" style="{behavior:url(#default#clientcaps)}" />
<SCRIPT>
var flash="";
    WMPVersion= oClientCaps.getComponentVersion("{22D6F312-B0F6-11D0-94AB-0080C74C7E95}","ComponentID");
    if (WMPVersion != "") {
    flash = "";
    var version = WMPVersion.split(",");
    var i;
    for (i = 0; i < version.length; i++){
      if (i != 0)
    flash += ".";
      flash += version[i];
    }
     document.write("您的Windows Media Player 版本是:"+flash+"<p>");
}
</SCRIPT>

//图象按比例

//细线SELECT

function getComputerName()
{
var objWMIService = GetObject("Winmgmts:rootcimv2");
for(e = new Enumerator(objWMIService) ; !e.atEnd() ; e.moveNext())
{
var getComputer = e.item();
return getComputer.Name;
}
}

//条件编译

//取得innerText

<SCRIPT LANGUAGE="JavaScript">

</SCRIPT>

//mergeAttributes 复制所有读/写标签属性到指定元素。

<SCRIPT>
function fnMerge(){
oSource.children[1].mergeAttributes(oSource.children[0]);
}
</SCRIPT>
<SPAN ID=oSource>
<DIV
ID="oDiv"
ATTRIBUTE1="true"
ATTRIBUTE2="true"
onclick="alert("click");"
onmouseover="this.style.color="#0000FF";"
onmouseout="this.style.color="#000000";"
>
This is a sample <B>DIV</B> element.
</DIV>
<DIV ID="oDiv2">
This is another sample <B>DIV</B> element.
</DIV>
</SPAN>
<INPUT
TYPE="button"
VALUE="Merge Attributes"
onclick="fnMerge()"
>

以上内容可以随意转载，转载后请注名来源和出处！

原文链接：http://ttyp.cnblogs.com/archive/2004/11/15/63900.aspx

//Import

function Import() {
for( var i=0; i<arguments.length; i++ ) {
var file = arguments[i];
if ( file.match(/.js$/i))
document.write("<script type="text/javascript" src="" + file + ""></sc" +"ript>");
else
document.write("<style type="text/css">@import "" + file + "" ;</style>");
}
};

//js枚举

//条件编译

//取得innerText

<SCRIPT LANGUAGE="JavaScript">

</SCRIPT>