javascript小技巧

zoukankan html css js c++ java

javascript小技巧
- 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 sdfs "
- 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;
//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="100px;height:21px;font-size:10pt;"><span style="18px;border:0px solid red;"><select name="r00" style="margin-left:-100px;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=" 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()"
>
来自http://www.cnblogs.com/ttyp/archive/2004/11/15/63900.html
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原文地址：https://www.cnblogs.com/qfb620/p/1109292.html