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Summary of javascript application tips and methods_javascript skills

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2016-05-16 15:51:221253browse

JavaScript front-end application experience tips continue to accumulate.

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&#63;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&#63;as= hehe"))) encodeURIComponent对":"、"/"、";" 和 "&#63;"也编码
表格行指示 <tr onmouseover="this.bgColor='#f0f0f0'" onmouseout="this.bgColor='#ffffff'">

//Various sizes

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; 

//Filter numbers

Copy code The code is as follows:

//Special purpose

Copy code The code is as follows:


//No caching

Copy code The code is as follows:

//Regular matching

Copy code The code is as follows:
Regular expression matching Chinese characters: [u4e00-u9fa5]
Match double-byte characters (including Chinese characters): [^x00-xff] Regular expression to match blank lines: [s| ]*r
Regular expression matching HTML tags: /.*1>|/
Regular expression matching leading and trailing spaces: (^s*)|(s*$) (trim function like vbscript)
Regular expression matching email addresses: w ([- .]w )*@w ([-.]w )*.w ([-.]w )*
Regular expression to match URL: http://([w-] .) [w-] (/[w- ./?%&=]*)? The following is an example: Using regular expressions Expression to limit the input content of the text box in the web form: Use regular expression to limit the input to Chinese only: onkeyup="value=value.replace(/[^u4E00-u9FA5]/g,'')" onbeforepaste="clipboardData. setData('text',clipboardData.getData('text').replace(/[^u4E00-u9FA5]/g,''))"
1. Use regular expressions to limit the input of only full-width characters: onkeyup="value=value.replace(/[^uFF00-uFFFF]/g,'')" onbeforepaste="clipboardData.setData('text',clipboardData.getData ('text').replace(/[^uFF00-uFFFF]/g,''))"
2. Use regular expressions to limit the input of numbers to only numbers: onkeyup="value=value.replace(/[^d]/g,'') "onbeforepaste="clipboardData.setData('text',clipboardData.getData('text ').replace(/[^d]/g,''))"
3. Use regular expressions to limit the input of numbers and English only: onkeyup="value=value.replace(/[W]/g,'') "onbeforepaste="clipboardData.setData('text',clipboardData.getData(' text').replace(/[^d]/g,''))"

//Eliminate the image toolbar

Copy code The code is as follows:
Summary of javascript application tips and methods_javascript skills or

//Close without prompt

Copy code The code is as follows:
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'
       str += '';
       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)

复制代码 代码如下:

//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

复制代码 代码如下:


//页面进入和退出的特效

进入页面
推出页面 
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

  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

page1

  

page2

 

//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&#63;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;}<!--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 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&#63;1:0   this.ie6=(this.ver.indexOf("MSIE 6")>-1 && this.dom)&#63;1:0;   this.ie5=(this.ver.indexOf("MSIE 5")>-1 && this.dom)&#63;1:0;   this.ie4=(document.all && !this.dom)&#63;1:0;   this.ns5=(this.dom && parseInt(this.ver) >= 5) &#63;1:0;   this.ns4=(document.layers && !this.dom)&#63;1:0;   this.mac=(this.ver.indexOf('Mac') > -1) &#63;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"><!--  //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> 

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