javascript 小技巧 | |
//过滤数字
//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:/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"
//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
//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" οnfοcus= "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
<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 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" 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 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
<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" οnclick=PageSetup_Null()> <input type= "button" value= "恢复页码" οnclick=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"><!-- //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 //移动的图层,拖动
1.<span style='position:absolute;width:200;height:200;background:red' οnmοusedοwn=MouseDown(
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> 2. <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
<iframe src="/"a.html" id=
"f" name=
"f" scrolling=
"no" frameborder=0 marginwidth=0 marg***ight=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>
<p style=
"page-break-after:always">page1</p>
<p style= "page-break-after:always">page2</p>
<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":
<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 οnclick=min.Click()> " <input type=button value="/最大化 οnclick=max.Click()> " <input type=button value="/关闭 οnclick=close.Click()> "
<META HTTP-EQUIV=
"pragma" CONTENT=
"no-cache">
<META HTTP-EQUIV= "Cache-Control" CONTENT= "no-cache, must-revalidate"> <META HTTP-EQUIV= "expires" CONTENT= "0">
<input type=button value=导入收藏夹 οnclick=
"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)">
<input type=text οnkeypress=
"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">
or <head> <meta http-equiv="imagetoolbar" content="no"> </head> |