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你想的到想不到的javascript应用小技巧方法

来源：岁月联盟编辑：exp 时间：2012-03-29

javascript 在前端应用体验小技巧继续积累。
• 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=="TD
document.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<body oncontextmenu="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.csdn.net/'">
• 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 <input onkeydown="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=checkbox style="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IE window.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 += "/r/n网页可见区域宽："+ document.body.clientWidth;
s += "/r/n网页可见区域高："+ document.body.clientHeight;
s += "/r/n网页可见区域高："+ document.body.offsetWeight +" (包括边线的宽)";   s += "/r/n网页可见区域高："+ document.body.offsetHeight +" (包括边线的宽)";   s += "/r/n网页正文全文宽："+ document.body.scrollWidth;
s += "/r/n网页正文全文高："+ document.body.scrollHeight;
s += "/r/n网页被卷去的高："+ document.body.scrollTop;
s += "/r/n网页被卷去的左："+ document.body.scrollLeft;
s += "/r/n网页正文部分上："+ window.screenTop;
s += "/r/n网页正文部分左："+ window.screenLeft;
s += "/r/n屏幕分辨率的高："+ window.screen.height;
s += "/r/n屏幕分辨率的宽："+ window.screen.width;
s += "/r/n屏幕可用工作区高度："+ window.screen.availHeight;
s += "/r/n屏幕可用工作区宽度："+ window.screen.availWidth;
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//过滤数字
<input type=text onkeypress="return event.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
<input type=button value=导入收藏夹 onclick="window.external.ImportExportFavorites(true,'http://localhost');"> <input type=button value=导出收藏夹 onclick="window.external.ImportExportFavorites(false,'http://localhost');"> <input type=button value=整理收藏夹 onclick="window.external.ShowBrowserUI('OrganizeFavorites', null)">
<input type=button value=语言设置   onclick="window.external.ShowBrowserUI('LanguageDialog', null)">
<input type=button value=加入收藏夹 onclick="window.external.AddFavorite('http://www.google.com/', 'google')"> <input type=button value=加入到频道 onclick="window.external.addChannel('http://www.google.com/')"> <input type=button value=加入到频道 onclick="window.external.showBrowserUI('PrivacySettings',null)">

//不缓存
<META HTTP-EQUIV="pragma" CONTENT="no-cache"> <META HTTP-EQUIV="Cache-Control" CONTENT="no-cache, must-revalidate">
<META HTTP-EQUIV="expires" CONTENT="0">

//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：/n[/s| ]*/r
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
<IMG SRC="mypicture.jpg" HEIGHT="100px" WIDTH="100px" GALLERYIMG="false"> or <head>
<meta http-equiv="imagetoolbar" content="no"> </head>

//无提示关闭
function Close(){
var ua=navigator.userAgent var ie=navigator.appName=="Microsoft Internet Explorer"?true:false if(ie) {       var IEversion=parseFloat(ua.substring(ua.indexOf("MSIE ")+5,ua.indexOf(";",ua.indexOf("MSIE "))))   if(IEversion< 5.5)
{
var str = '<object id=noTipClose classid="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)
<script language="javascript"> function getoffset(e) { var t=e.offsetTop; var l=e.offsetLeft; while(e=e.offsetParent) {
t+=e.offsetTop;    l+=e.offsetLeft; } var rec = new Array(1);
rec[0] = t; rec[1] = l; return rec } </script>
//获得控件的绝对位置(2)
oRect = obj.getBoundingClientRect();
oRect.left oRect.
//最小化,最大化,关闭
<object id=min classid="clsid:ADB880A6-D8FF-11CF-9377-00AA003B7A11">
<param name="Command" value="Minimize"></object>
<object id=max classid="clsid:ADB880A6-D8FF-11CF-9377-00AA003B7A11">
<param name="Command" value="Maximize"></object>
<OBJECT id=close classid="clsid:adb880a6-d8ff-11cf-9377-00aa003b7a11">
<PARAM NAME="Command" value="Close"></OBJECT>
<input type=button value=最小化 onclick=min.Click()>
<input type=button value=最大化 onclick=max.Click()>
<input type=button value=关闭 onclick=close.Click()>

//光标停在文字最后

<script language="javascript"> function cc() { var e = event.srcElement; var r =e.createTextRange();
r.moveStart('character',e.value.length); r.collapse(true); r.select(); } </script>
<input type=text name=text1 value="123" onfocus="cc()">
//页面进入和退出的特效
进入页面<meta http-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
<meta name="ROBOTS" content="属性值"> 　　其中属性值有以下一些: 　　属性值为"all": 文件将被检索，且页上链接可被查询；　　属性值为"none": 文件不被检索，而且不查询页上的链接；　　属性值为"index": 文件将被检索；　　属性值为"follow": 查询页上的链接；　　属性值为"noindex": 文件不检索，但可被查询链接；　　属性值为"nofollow":

//打印分页
<p style="page-break-after:always">page1</p>
<p style="page-break-after:always">page2</p>

//设置打印
<object id="factory" style="display:none" viewastext
classid="clsid:1663ed61-23eb-11d2-b92f-008048fdd814"
codebase="http://www.meadroid.com/scriptx/ScriptX.cab#Version=5,60,0,360" ></object>
<input type=button value=页面设置 onclick="factory.printing.PageSetup()">
<input type=button value=打印预览 onclick="factory.printing.Preview()">
<script language=javascript> function window.onload()
{
// -- advanced features    factory.printing.SetMarginMeasure(2) // measure margins in inches    factory.printing.SetPageRange(false, 1,
3) // need pages from 1 to 3    factory.printing.printer = "HP DeskJet 870C"
   factory.printing.copies = 2    factory.printing.collate = true
   factory.printing.paperSize = "A4"
   factory.printing.paperSource = "Manual feed"
// -- basic features
factory.printing.header = "居左显示&b居中显示&b居右显示页码，第&p页/共&P页"
   factory.printing.footer = "（自定义页脚）"
   factory.printing.portrait = false
   factory.printing.leftMargin = 0.75
   factory.printing.topMargin = 1.5
   factory.printing.rightMargin = 0.75
   factory.printing.bottomMargin = 1.5 } function Print(frame) {
factory.printing.Print(true, frame) // print with prompt } </script>
<input type=button value="打印本页" onclick="factory.printing.Print(false)">
<input type=button value="页面设置" onclick="factory.printing.PageSetup()">
<input type=button value="打印预览" onclick="factory.printing.Preview()"><br>
<a href="http://www.meadroid.com/scriptx/docs/printdoc.htm?static" target=_blank>具体使用手册，更多信息，点这里</a>
//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
<script language="JavaScript">   var HKEY_Root,HKEY_Path,HKEY_Key;
HKEY_Root="HKEY_CURRENT_USER";
HKEY_Path="//Software//Microsoft//Internet Explorer//PageSetup//";
//设置网页打印的页眉页脚为空 function PageSetup_Null() { try {
         var Wsh=new ActiveXObject("WScript.Shell");   HKEY_Key="header";
Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key,"");   HKEY_Key="footer";
Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key,""); } catch(e){} } //设置网页打印的页眉页脚为默认值 function PageSetup_Default() {   try
{   var Wsh=new ActiveXObject("WScript.Shell");   HKEY_Key="header";
Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key,"&w&b页码,&p/&P");
HKEY_Key="footer";
Wsh.RegWrite(HKEY_Root+HKEY_Path+HKEY_Key,"&u&b&d"); } catch(e){} } </script>
<input type="button" value="清空页码" onclick=PageSetup_Null()>
<input type="button" value="恢复页码" onclick=PageSetup_Default()>
//浏览器验证
function checkBrowser()
{     this.ver=navigator.appVersion
this.dom=document.getElementById?1:0
this.ie6=(this.ver.indexOf("MSIE 6")>-1 && this.dom)?1:0;
this.ie5=(this.ver.indexOf("MSIE 5")>-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)     return this;
}
//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/r/n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
function modelessAlert(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"> </script> </body>
//可编辑SELECT
<input type=text name=re_name style="width:100px;height:21px;font-size:10pt;"><span style="width:18px;border:0px solid red;"><select name="r00" style="margin-left:-100px;width:118px; background-color:#FFEEEE;" onChange="document.all.re_name.value=this.value;">
                <option value="1">11111111<option>
                <option value="2">222222</option>
                <option value="3">333333</option>
              </select>               </span>

//设置光标位置
function getCaret(textbox) {
var control = document.activeElement;
textbox.focus();
var rang = document.selection.createRange();
rang.setEndPoint("StartToStart",textbox.createTextRange())
control.focus();
return rang.text.length;
} function setCaret(textbox,pos)
{ try
{
var r =textbox.createTextRange();
   r.moveStart('character',pos);
r.collapse(true);
r.select();
} catch(e) {} } function selectLength(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)}
} function insertAtCaret(textbox,text) {
textbox.focus();
document.selection.createRange().text = text;
}
//页内查找
function findInPage(str) {
var txt, i, found,n = 0;
if (str == "")
{   return false;
}
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。/n /n请试着输入页面中的关键字再次查找！");
} } return false; }
//书
http://www.itpub.net/attachment.php?s=&postid=1894598
http://www.wrclub.net/down/listdown.aspx?id=1341
//操作EXECL
<script language="javascript"> function jStartExcel() {
var xls = new ActiveXObject ( "Excel.Application" );
xls.visible = true;
var newBook = xls.Workbooks.Add;
newBook.Worksheets.Add;
newBook.Worksheets(1).Activate;
xls.ActiveWorkBook.ActiveSheet.PageSetup.Orientation = 2;
xls.ActiveWorkBook.ActiveSheet.PageSetup.PaperSize = 5;
newBook.Worksheets(1).Columns("A").columnwidth=50;
newBook.Worksheets(1).Columns("A").WrapText = true;
newBook.Worksheets(1).Columns("B").columnwidth=50;
newBook.Worksheets(1).Columns("B").WrapText = true;
newBook.Worksheets(1).Range("A1:B1000").NumberFormat = "0";
newBook.Worksheets(1).Range("A1:B1000").HorizontalAlignment = -4131;
newBook.Worksheets(1).Cells(1,1).Interior.ColorIndex="15";
newBook.Worksheets(1).Cells(1,1).value="First Column, First Cell";
newBook.Worksheets(1).Cells(2,1).value="First Column, Second Cell";
newBook.Worksheets(1).Cells(1,2).value="Second Column, First Cell";
newBook.Worksheets(1).Cells(2,2).value="Second Column, Second Cell";
newBook.Worksheets(1).Name="My First WorkSheet"; }
</script>
//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>");
function showPopupText(){ 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 else popStyle="cPopText";
curShow=setTimeout("showIt()",tPopWait);
} } } function showIt(){
dypopLayer.className=popStyle;
dypopLayer.innerHTML=sPop;
popWidth=dypopLayer.clientWidth;
popHeight=dypopLayer.clientHeight;
if(MouseX+12+popWidth>document.body.clientWidth) popLeftAdjust=-popWidth-24
else popLeftAdjust=0;
if(MouseY+12+popHeight>document.body.clientHeight) popTopAdjust=-popHeight-24
else popTopAdjust=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(); }
function fadeOut(){ 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);
} } function fadeIn(){ 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") return false;
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 = new ActiveXObject("Msxml2.DOMDocument");
doc = new ActiveXObject("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=="Microsoft Internet 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+'/n'+'ie浏览器中键值:'+iekey+'/n'+'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_ROOT/Scripting.FileSystemObject Scripting.FileSystemObject
3.对于使用object的用户，修改HKEY_CLASSES_ROOT/Scripting.
//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media play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
<script language="JavaScript">  </script> <img src=".." onload = "DrawImage(this)">

//细线SELECT
<span style="border:1px solid #000000; position:absolute; overflow:hidden;" >
<select style="margin:-2px;"> <option>1111</option>
<option>11111111111111</option>
<option>111111111</option>
</select></span>
//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

function getComputerName() { var objWMIService = GetObject("Winmgmts:root/cimv2");
for(e = new Enumerator(objWMIService) ;
!e.atEnd() ;
e.moveNext())
{
var getComputer = e.item();
return getComputer.Name;
}
}
//条件编译
<script language=javascript>
/*@cc_on @*/ /*@if (@_win32 && @_jscript_version>5)
function window.confirm(str) {
    execScript("n = msgbox('"+ str +"', 257)", "vbscript");
    return(n == 1); } @end @*/ </script>
//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()" >