javascript小技巧

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mb646713a07a071 2023-05-21 08:21:48 博主文章分类：javascript ©著作权

文章标签 JavaScript 正则表达式 IE 全文检索 Web 文章分类 Python 后端开发

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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.οnmοusedοwn=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

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

禁止选取<body οncοntextmenu="return false" οndragstart="return false" onselectstart ="return false" οnselect="document.selection.empty()" οncοpy="document.selection.empty()" onbeforecopy="return false"οnmοuseup="document.selection.empty()>

禁止粘贴

地址栏图标

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

查看源码

<input type=button value=查看网页源代码 οnclick="window.location = 'view-source:'+\> 关

闭输入法

自动全选

ENTER键可以让光标移到下一个输入框

文本框的默认值 <input type=text value="123" οnfοcus="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

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 οnmοuseοver="this.bgColor='#f0f0f0'" οnmοuseοut="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

"return event.keyCode>=48&&event.keyCode<=57||(this.value.indexOf('.')<0?event.keyCode==46:false)" οnpaste= 
 "return !clipboardData.getData('text').match(/\D/)" οndragenter= 
 "return false">

//特殊用途

"window.external.ImportExportFavorites(true,'http://localhost');">  
 
<input type=button value=导出收藏夹 οnclick= 
 "window.external.ImportExportFavorites(false,'http://localhost');">  
 
<input type=button value=整理收藏夹 οnclick= 
 "window.external.ShowBrowserUI('OrganizeFavorites', null)"> 
 
<input type=button value=语言设置   οnclick= 
 "window.external.ShowBrowserUI('LanguageDialog', null)"> 
 
<input type=button value=加入收藏夹 οnclick= 
 "window.external.AddFavorite('http://www.google.com/', 'google')">  
 
<input type=button value=加入到频道 οnclick= 
 "window.external.addChannel('http://www.google.com/')">  
 
<input type=button value=加入到频道 οnclick= 
 "window.external.showBrowserUI('PrivacySettings',null)">

//不缓存

"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：οnkeyup= 
 "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： οnkeyup= 
 "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：οnkeyup= 
 "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：οnkeyup= 
 "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)

"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

"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 οnclick=min.Click()>  
 
<input type=button value=最大化 οnclick=max.Click()>  
 
<input type=button value=关闭 οnclick=close.Click()>

//光标停在文字最后

"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" οnfοcus= 
 "cc()">

//页面进入和退出的特效

"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

"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

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

//设置打印

"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 οnclick= 
 "factory.printing.PageSetup()"> 
 
<input type=button value=打印预览 οnclick= 
 "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" οnclick= 
 "factory.printing.Print(false)"> 
 
<input type=button value= 
 "页面设置" οnclick= 
 "factory.printing.PageSetup()"> 
 
<input type=button value= 
 "打印预览" οnclick= 
 "factory.printing.Preview()"><br> 
 
<a href= 
 "http://www.meadroid.com/scriptx/docs/printdoc.htm?static"

//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;}<!--用本样式在打印时隐藏非打印项目-->  
 
.PageNext{page-break-after: always;}<!--控制分页-->  
 
</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 οnclick=document.all.WebBrowser.ExecWB(6,1)>  
 
<input type=button value=直接打印 οnclick=document.all.WebBrowser.ExecWB(6,6)>  
 
<input type=button value=页面设置 οnclick=document.all.WebBrowser.ExecWB(8,1)>  
 
</p>  
 
<p> <input type=button value=打印预览 οnclick=document.all.WebBrowser.ExecWB(7,1)>  
 
</center>

//去掉打印时的页眉页脚

"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" οnclick=PageSetup_Null()> 
 
<input type= 
 "button" value= 
 "恢复页码"

//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

"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"><!-- 
 
   
 //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  
 
function document.oncontextmenu(){event.returnValue= 
 false;} 
 //屏蔽鼠标右键  
 
function window.onhelp(){ 
 return  
 false}  
 //屏蔽F1帮助  
 
function document.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"); 
 
       
 return  
 false; 
 
  } 
 
} 
 
</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

this) οnmοusemοve=MouseMove() οnmοuseup=MouseUp()>meizz</span> 
 
<script language=javascript> 
 
var Obj; 
 
function MouseDown(obj) 
 
{ 
 
  Obj=obj; 
 
  Obj.setCapture(); 
 
  Obj.l=event.x-Obj.style.pixelLeft; 
 
  Obj.t=event.y-Obj.style.pixelTop; 
 
} 
 
function MouseMove() 
 
{ 
 
   
 if(Obj!= 
 null) 
 
  { 
 
    Obj.style.left = event.x-Obj.l; 
 
    Obj.style.top = event.y-Obj.t; 
 
  } 
 
} 
 
function MouseUp() 
 
{ 
 
   
 if(Obj!= 
 null) 
 
  { 
 
    Obj.releaseCapture(); 
 
    Obj= 
 null; 
 
  } 
 
} 
 
</script>

<div id= 
 "myDiv" src= 
 "logo.gif" οndrag= 
 "doDrag();" οnmοuseοver= 
 "this.style.cursor='hand'" style= 
 "position:absolute;left=100;top=100;" οnmοusedοwn= 
 "doMouseDown();"> 
 
<a href= 
 "#" οnclick= 
 "return false"><h1>wlecome</h1></a> 
 
</div> 
 
<script language= 
 "JavaScript" type= 
 "text/javascript"> 
 
var orgMouseX; 
 
var orgMouseY; 
 
var orgObjX; 
 
var orgObjY; 
 
function doDrag() 
 
{ 
 
var myObject=document.all.myDiv; 
 

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

"a.html" id= 
 "f" name= 
 "f" scrolling= 
 "no" frameborder=0 marginwidth=0 marginheight=0></iframe> 
 
<script> 
 
var doc=window.frames[ 
 "f"].document; 
 
function s(){ 
 
  
 if (doc.readyState== 
 "complete"){ 
 
  document.all.f.style.height=doc.body.scrollHeight 
 
  document.all.f.style.width=doc.body.scrollWidth 
 
 } 
 
} 
 
doc.onreadystatechange=s 
 
</script>

//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

function SetCookie(sName, sValue) 
 
{ 
 
 document.cookie = sName +  
 "=" + escape(sValue) +  
 "; "; 
 
} 
 
function GetCookie(sName) 
 
{ 
 
  
 var aCookie = document.cookie.split( 
 "; "); 
 
 for ( 
 var i=0; i < aCookie.length; i++) 
 
 { 
 
   
 
   
 var aCrumb = aCookie[i].split( 
 "="); 
 
   
 if (sName == aCrumb[0])  
 
   
 return unescape(aCrumb[1]); 
 
 } 
 
  
 
} 
 
function DelCookie(sName) 
 
{ 
 
document.cookie = sName +  
 "=" + escape(sValue) +  
 "; expires=Fri, 31 Dec 1999 23:59:59 GMT;"; 
 
}

//setTimeout增加参数

<script> 
 
var _st = window.setTimeout; 
 
window.setTimeout =  
 function(fRef, mDelay) { 
 
  
 if(typeof fRef == ' 
 function'){ 
 
   
 var argu =  
 Array.prototype.slice.call(arguments,2); 
 
   
 var f = ( 
 function(){ fRef.apply( 
 null, argu); }); 
 
   
 return _st(f, mDelay); 
 
 } 
 
  
 return _st(fRef,mDelay); 
 
} 
 
function test(x){ 
 
 alert(x); 
 
} 
 
window.setTimeout(test,1000,'fason'); 
 
</script>

//自定义的apply,call

function (obj, argu) { 
 
  
 if (obj) obj.constructor.prototype._caller =  
 this;  
 
  
 var argus =  
 new  
 Array(); 
 
 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 =  
 new  
 Array(); 
 
 for ( 
 var i=1;i<arguments.length;i++) 
 
  argu[i-1] = arguments[i]; 
 
  
 return  
 this.apply(obj, argu); 
 
};

//下载文件

function DownURL(strRemoteURL,strLocalURL) 
 
{ 
 
 try 
 
 { 
 
   
 var xmlHTTP= 
 new  
 ActiveXObject( 
 "Microsoft.XMLHTTP"); 
 
  xmlHTTP.open( 
 "Get",strRemoteURL, 
 false); 
 
  xmlHTTP.send(); 
 
   
 var adodbStream= 
 new  
 ActiveXObject( 
 "ADODB.Stream"); 
 
  adodbStream.Type=1; 
 //1=adTypeBinary  
 
  adodbStream.Open(); 
 
  adodbStream.write(xmlHTTP.responseBody); 
 
  adodbStream.SaveToFile(strLocalURL,2); 
 
  adodbStream.Close(); 
 
  adodbStream= 
 null; 
 
  xmlHTTP= 
 null; 
 
   
 
 } 
 
  
 catch(e) 
 
 { 
 
  window.confirm( 
 "下载URL出错!"); 
 
 } 
 
  
 //window.confirm("下载完成.");  
 
}

//检验连接是否有效

function getXML(URL)  
 
{ 
 
  
 var xmlhttp =  
 new  
 ActiveXObject( 
 "microsoft.xmlhttp"); 
 
 xmlhttp.Open( 
 "GET",URL,  
 false);  
 
 try 
 
 {  
 
  xmlhttp.Send(); 
 
 } 
 
  
 catch(e){} 
 
  
 finally  
 
 { 
 
   
 var result = xmlhttp.responseText; 
 
   
 if(result)  
 
  { 
 
    
 if(xmlhttp.Status==200) 
 
   { 
 
     
 return( 
 true); 
 
   } 
 
    
 else  
 
   { 
 
     
 return( 
 false); 
 
   } 
 
  } 
 
   
 else  
 
  { 
 
    
 return( 
 false); 
 
  } 
 
 } 
 
}

//POST代替FORM

"VBScript"> 
 
Function URLEncoding(vstrIn) 
 
    strReturn =  
 "" 
 
    For i = 1 To Len(vstrIn) 
 
        ThisChr = Mid(vStrIn,i,1) 
 
        If Abs(Asc(ThisChr)) < &HFF Then 
 
            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 < &H80 Then 
 
            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

function CheckURL(URL) 
 
{ 
 
   
 var xmlhttp =  
 new  
 ActiveXObject( 
 "Microsoft.XMLHTTP"); 
 
  xmlhttp.Open( 
 "GET",URL,  
 false); 
 
  try 
 
  {  
 
    xmlhttp.Send();  
 
     
 var result = xmlhttp.status; 
 
  } 
 
   
 catch(e) { 
 return( 
 false); } 
 
   
 if(result==200) 
 
  {  
 
     
 return  
 true; 
 
  } 
 
  xmlhttp =  
 null; 
 
   
 return  
 false; 
 
}

//连接数据库

"javascript"> 
 
   
 //用 JavaScript 写服务器端连接数据库的代码示例  
 
   
 var conn =  
 new  
 ActiveXObject( 
 "ADODB.Connection"); 
 
  conn.Open( 
 "Provider=SQLOLEDB.1; Data Source=localhost; User ID=sa; " 
 
    + 
 "Password=; Initial Catalog=pubs"); 
 
   
 var rs =  
 new  
 ActiveXObject( 
 "ADODB.Recordset"); 
 
   
 var sql= 
 "select * from authors"; 
 
  rs.open(sql, conn); 
 
 shtml =  
 "<table width='100%' border=1>"; 
 
 shtml += 
 "<tr bgcolor='#f4f4f4'><td>au_id</td><td>au_lname</td><td>au_fname</td><td>phone</td><td>address</td><td> city</td><td>state</td><td>zip</td></tr>"; 
 
   
 while(!rs.EOF) 
 
  { 
 
 shtml +=  
 "<tr><td>" + rs( 
 "au_id") +  
 "</td><td>" + rs( 
 "au_lname") +  
 "</td><td>" + rs( 
 "au_fname") +  
 "</td><td>" + rs( 
 "phone") +  
 "</td><td>" + rs( 
 "address") +  
 "</td><td>" + rs( 
 "city") +  
 "</td><td>" + rs( 
 "state") +  
 "</td><td>" + rs( 
 "zip") +  
 "</td></tr>"; 
 
 rs.moveNext; 
 
  } 
 
  shtml +=  
 "</table>"; 
 
  document.write(shtml); 
 
  rs.close();  
 
  rs =  
 null;  
 
  conn.close();  
 
  conn =  
 null; 
 
</script>

//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

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