- 技术人生
- JavaScript点滴
JavaScript点滴
1.window.screen.width (height) 属性可以提供屏幕宽（高） window.resizeTo 和 window.moveTo可以控制窗口位置大小。2.email合法性验证<script language="JavaScript"> <!-- function check_email() { if (document.form.email.value=="") {alert('Email address is NULL!'); document.form.email.focus(); return false;} if ((document.form.email.value.indexOf ('@') == -1)|| (document.form.email.value.indexOf ('.') == -1)) {alert('Email address is invalid!'); document.form.email.focus(); return false;} } // --> </script>3.连接速度检测<script>tim=1setInterval("tim++",100)b=1var autourl=new Array()autourl[0]="www.qtol.net"autourl[1]="www.51js.net"autourl[2]="www.sina.com.cn"function butt(){document.write("<form name=autof>")for(var i=0;i<autourl.length;i++){document.write("<input type=text name=txt"+i+" size=10 value=测试中……> =》<input type=text name=url"+i+" size=40> =》<input type=button value=GO οnclick=window.open(this.form.url"+i+".value)><br>");}document.write("<input type=submit value=刷新></form>")}butt()function auto(url){document.forms[0]["url"+b].value=urlif(tim>200){document.forms[0]["txt"+b].value="链接超时";}else{document.forms[0]["txt"+b].value="时间"+tim/10+"秒";}b++}function run(){for(var i=0;i<autourl.length;i++){document.write("<img src=http://"+autourl[i]+"/"+Math.random()+" width=1 height=1 οnerrοr=auto('http://"+autourl[i]+"')>");}}run();</script>4.子窗口的参数传到父窗口中window.opener.forms[0].txtA.value="return value";5.使前面无效的用@ http://www.163.com@www.qtol.net使后面无效的用# http://www.163.com#www.qtol.net6.变量名<script>var aaa001="www.qtol.net";var username="aaa";var ID=001;alert(eval(username+ID));</script>7.页面另存,打开,打印<button οnclick="document.execcommand('saveas')">saveas</button><button οnclick="document.execCommand('open')">Open</button><button οnclick="document.execCommand('print')">Print</button>8.如何判断输入内容为数字请输入数字:<input id=t><input type=button value=check οnclick='if(isNaN(t.value))alert("别走,你的身份证号不对...")'>9.检测是否安装mediaPlayer<object classid=clsid:22D6F312-B0F6-11D0-94AB-0080C74C7E95 οnerrοr=alert("没装mediaPlayer?")></object>10.按下鼠标左键时怎样判断鼠标点中的对象的名字<BODY οnclick="javascript:alert(event.srcElement.name)"><a name="aaa">hit me!</a></BODY>■打开■ <input name=Button onClick=document.all.WebBrowser.ExecWB(1,1) type=button value=打开> <OBJECT classid=CLSID:8856F961-340A-11D0-A96B-00C04FD705A2 height=0 id=WebBrowser width=0></OBJECT> ■另存为■ <input name=Button onClick=document.all.WebBrowser.ExecWB(4,1) type=button value=另存为><OBJECT classid=CLSID:8856F961-340A-11D0-A96B-00C04FD705A2 height=0 id=WebBrowser width=0></OBJECT> ■属性■ <input name=Button onClick=document.all.WebBrowser.ExecWB(10,1) type=button value=属性><OBJECT classid=CLSID:8856F961-340A-11D0-A96B-00C04FD705A2 height=0 id=WebBrowser width=0></OBJECT> ■打印■ <input name=Button onClick=document.all.WebBrowser.ExecWB(6,1) type=button value=打印><OBJECT classid=CLSID:8856F961-340A-11D0-A96B-00C04FD705A2 height=0 id=WebBrowser width=0></OBJECT> ■页面设置■ <input name=Button onClick=document.all.WebBrowser.ExecWB(8,1) type=button value=页面设置><OBJECT classid=CLSID:8856F961-340A-11D0-A96B-00C04FD705A2 height=0 id=WebBrowser width=0></OBJECT> ■刷新■ <input type=button value=刷新 name=refresh οnclick="window.location.reload()"> ■导入收藏■ <input type="button" name="Button" value="导入收藏夹" onClick=window.external.ImportExportFavorites(true,);> ■导出收藏■ <input type="button" name="Button3" value="导出收藏夹" onClick=window.external.ImportExportFavorites(false,);> ■加入收藏■ <INPUT name=Button2 οnclick="window.external.AddFavorite(location.href, document.title)" type=button value=加入收藏夹> ■整理收藏夹■ <INPUT name=Submit2 οnclick="window.external.ShowBrowserUI(OrganizeFavorites, null)" type=button value=整理收藏夹> ■查看原文件■ <INPUT name=Button οnclick=window.location = "view-source:" + window.location.href type=button value=查看源文件> ■语言设置■ <INPUT name=Button οnclick="window.external.ShowBrowserUI(LanguageDialog, null)" type=button value=语言设置> ■前进■ <INPUT name=Submit οnclick=history.go(1) type=submit value=前进> ■后退■ <INPUT name=Submit2 οnclick=history.go(-1) type=submit value=后退>在一个字符串中取左边几个的函数 取右边几个的函数 取从第几到第几的函数left(string,n) right(string,n) mid(string,n1,n) string:要截取的字符串 n表示截取的个数 n1表示从第几个开始截取
1. οncοntextmenu="window.event.returnvalue=false" 将彻底屏蔽鼠标右键<table border οncοntextmenu=return(false)><td>no</table> 可用于Table2. <body onselectstart="return false"> 取消选取、防止复制3. οnpaste="return false" 不准粘贴4. οncοpy="return false;" oncut="return false;" 防止复制5. <link rel="Shortcut Icon" href="favicon.ico"> IE地址栏前换成自己的图标6. <link rel="Bookmark" href="favicon.ico"> 可以在收藏夹中显示出你的图标7. <input style="ime-mode:disabled"> 关闭输入法8. 永远都会带着框架<script language="javascript"><!--if (window == top)top.location.href = "frames.htm"; //frames.htm为框架网页// --></script>9. 防止被人frame<SCRIPT LANGUAGE=javascript><!-- if (top.location != self.location)top.location=self.location;// --></SCRIPT>10. <noscript><iframe src=*.html></iframe></noscript> 网页将不能被另存为11. <input type=button value=查看网页源代码 οnclick="window.location = 'view-source:'+ 'http://www.csdn.net/'">12. 怎样通过asp的手段来检查来访者是否用了代理<% if Request.ServerVariables("HTTP_X_FORWARDED_FOR")<>"" thenresponse.write "<font color=#FF0000>您通过了代理服务器，"& _"真实的IP为"&Request.ServerVariables("HTTP_X_FORWARDED_FOR")end if%>13. 取得控件的绝对位置//javascript<script language="javascript">function getIE(e){var t=e.offsetTop;var l=e.offsetLeft;while(e=e.offsetParent){t+=e.offsetTop;l+=e.offsetLeft;}alert("top="+t+"/nleft="+l);}</script>//VBScript<script language="VBScript"><!--function getIE()dim t,l,a,bset a=document.all.img1t=document.all.img1.offsetTopl=document.all.img1.offsetLeftwhile a.tagName<>"BODY"set a = a.offsetParentt=t+a.offsetTopl=l+a.offsetLeftwendmsgbox "top="&t&chr(13)&"left="&l,64,"得到控件的位置"end function--></script>14. 光标是停在文本框文字的最后<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()">15. 判断上一页的来源asp:request.servervariables("HTTP_REFERER")java script:document.referrer16. 最小化、最大化、关闭窗口<object id=hh1 classid="clsid:ADB880A6-D8FF-11CF-9377-00AA003B7A11"> <param name="Command" value="Minimize"></object><object id=hh2 classid="clsid:ADB880A6-D8FF-11CF-9377-00AA003B7A11"> <param name="Command" value="Maximize"></object><OBJECT id=hh3 classid="clsid:adb880a6-d8ff-11cf-9377-00aa003b7a11"><PARAM NAME="Command" value="Close"></OBJECT><input type=button value=最小化 οnclick=hh1.Click()><input type=button value=最大化 οnclick=hh2.Click()><input type=button value=关闭 οnclick=hh3.Click()>本例适用于IE17. <%'定义数据库连接的一些常量Const adOpenForwardOnly = 0 '游标只向前浏览记录，不支持分页、Recordset、BookMarkConst adOpenKeyset = 1 '键集游标，其他用户对记录说做的修改将反映到记录集中，但其他用户增加或删除记录不会反映到记录集中。支持分页、Recordset、BookMarkConst adOpenDynamic = 2 '动态游标功能最强，但耗资源也最多。用户对记录说做的修改，增加或删除记录都将反映到记录集中。支持全功能浏览(ACCESS不支持)。Const adOpenStatic = 3 '静态游标，只是数据的一个快照，用户对记录说做的修改，增加或删除记录都不会反映到记录集中。支持向前或向后移动Const adLockReadOnly = 1 '锁定类型，默认的，只读，不能作任何修改Const adLockPessimistic = 2 '当编辑时立即锁定记录，最安全的方式Const adLockOptimistic = 3 '只有在调用Update方法时才锁定记录集，而在此前的其他操作仍可对当前记录进行更改、插入和删除等Const adLockBatchOptimistic = 4 '当编辑时记录不会被锁定，而更改、插入和删除是在批处理方式下完成的Const adCmdText = &H0001Const adCmdTable = &H0002%>18. 网页不会被缓存HTM网页<META HTTP-EQUIV="pragma" CONTENT="no-cache"><META HTTP-EQUIV="Cache-Control" CONTENT="no-cache, must-revalidate"><META HTTP-EQUIV="expires" CONTENT="Wed, 26 Feb 1997 08:21:57 GMT">或者<META HTTP-EQUIV="expires" CONTENT="0">ASP网页Response.Expires = -1Response.ExpiresAbsolute = Now() - 1Response.cachecontrol = "no-cache"PHP网页header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");header("Cache-Control: no-cache, must-revalidate");header("Pragma: no-cache");19. 检查一段字符串是否全由数字组成<script language="javascript"><!--function checkNum(str){return str.match(//D/)==null}alert(checkNum("1232142141"))alert(checkNum("123214214a1"))// --></script>20. 获得一个窗口的大小document.body.clientWidth,document.body.clientHeight21. 怎么判断是否是字符if (/[^/x00-/xff]/g.test(s)) alert("含有汉字");else alert("全是字符");22.TEXTAREA自适应文字行数的多少<textarea rows=1 name=s1 cols=27 onpropertychange="this.style.posHeight=this.scrollHeight"></textarea>23. 日期减去天数等于第二个日期<script language=javascript>function cc(dd,dadd){//可以加上错误处理var a = new Date(dd)a = a.valueOf()a = a - dadd * 24 * 60 * 60 * 1000a = new Date(a)alert(a.getFullYear() + "年" + (a.getMonth() + 1) + "月" + a.getDate() + "日")}cc("12/23/2002",2)</script>24. 选择了哪一个Radio<HTML><script language="vbscript">function checkme()for each ob in radio1if ob.checked then window.alert ob.valuenextend function</script><BODY><INPUT name="radio1" type="radio" value="style" checked>Style<INPUT name="radio1" type="radio" value="barcode">Barcode<INPUT type="button" value="check" οnclick="checkme()"></BODY></HTML>25.获得本页url的request.servervariables("")集合Response.Write "<TABLE border=1><!-- Table Header --><TR><TD><B>Variables</B></TD><TD><B>value</B></TD></TR>"for each ob in Request.ServerVariablesResponse.Write "<TR><TD>"&ob&"</TD><TD>"&Request.ServerVariables(ob)&"</TD></TR>"nextResponse.Write "</TABLE>"26.本机ip<%=request.servervariables("remote_addr")%>服务器名<%=Request.ServerVariables("SERVER_NAME")%>服务器IP<%=Request.ServerVariables("LOCAL_ADDR")%>服务器端口<%=Request.ServerVariables("SERVER_PORT")%>服务器时间<%=now%>IIS版本<%=Request.ServerVariables"SERVER_SOFTWARE")%>脚本超时时间<%=Server.ScriptTimeout%>本文件路径<%=server.mappath(Request.ServerVariables("SCRIPT_NAME"))%>服务器CPU数量<%=Request.ServerVariables("NUMBER_OF_PROCESSORS")%>服务器解译引擎<%=ScriptEngine & "/"& ScriptEngineMajorVersion &"."&ScriptEngineMinorVersion&"."& ScriptEngineBuildVersion %>服务器操作系统<%=Request.ServerVariables("OS")%>27.ENTER键可以让光标移到下一个输入框<input οnkeydοwn="if(event.keyCode==13)event.keyCode=9">28. 检测某个网站的链接速度：把如下代码加入<body>区域中:<script language=javascript>tim=1setInterval("tim++",100)b=1var autourl=new Array()autourl[1]="www.njcatv.net"autourl[2]="javacool.3322.net"autourl[3]="www.sina.com.cn"autourl[4]="www.nuaa.edu.cn"autourl[5]="www.cctv.com"function butt(){document.write("<form name=autof>")for(var i=1;i<autourl.length;i++)document.write("<input type=text name=txt"+i+" size=10 value=测试中……> =》<input type=text name=url"+i+" size=40> =》<input type=button value=GO οnclick=window.open(this.form.url"+i+".value)><br/>")document.write("<input type=submit value=刷新></form>")}butt()function auto(url){document.forms[0]["url"+b].value=urlif(tim>200){document.forms[0]["txt"+b].value="链接超时"}else{document.forms[0]["txt"+b].value="时间"+tim/10+"秒"}b++}function run(){for(var i=1;i<autourl.length;i++)document.write("<img src=http://"+autourl[i]+"/"+Math.random()+" width=1 height=1 οnerrοr=auto('http://";+autourl[i]+"')>")}run()</script>29. 各种样式的光标auto ：标准光标default ：标准箭头hand ：手形光标wait ：等待光标text ：I形光标vertical-text ：水平I形光标no-drop ：不可拖动光标not-allowed ：无效光标help ：?帮助光标all-scroll ：三角方向标move ：移动标crosshair ：十字标e-resizen-resizenw-resizew-resizes-resizese-resizesw-resize
