JS技巧

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2024-07-09 15:50:03 223人阅读

1.文本框焦点问题 onBlur:当失去输入焦点后产生该事件 onFocus:当输入获得焦点后，产生该文件 Onchange:当文字值改变时，产生该事件 Onselect:当文字加亮后，产生该文件

<input type="text" value=http://www.mamicode.com/"郭强" onfocus="if(value==‘郭强‘) {value=‘‘}" onblur="if (value==‘‘) {value=‘郭强‘}">点击时文字消失，失去焦点时文字再出现

2.网页按钮的特殊颜色 <input type=button name="Submit1" value=http://www.mamicode.com/"郭强" size=10 class="s02"

style="background-color:rgb(235,207,22)">

3.鼠标移入移出时颜色变化 <input type="submit" value=http://www.mamicode.com/"找吧" name="B1" onm ouseOut=this.style.color="blue"

onMouseOver=this.style.color="red" class="button">

4.平面按钮 <input type=submit value=http://www.mamicode.com/订阅 style="border:1px solid :#666666; height:17px; width:25pt; font-size:9pt;

BACKGROUND-COLOR: #E8E8FF; color:#666666" name="submit">

5.按钮颜色变化 <input type=text name="nick" style="border:1px solid #666666; font-size:9pt; height:17px;

BACKGROUND-COLOR: #F4F4FF; color:#ff6600" size="15" maxlength="16">

6.平面输入框 <input type="text" name="T1" size="20" style="border-style: solid; border-width: 1">

7.使窗口变成指定的大小 <script> window.resizeTo(300,283); </script>

8.使文字上下滚动 <marquee direction=up scrollamount=1 scrolldelay=100 onm ouseover=‘this.stop()‘ onm ouseout=‘this.start()‘

height=60>  <tr> <td> 共和国 </table>  </marquee>

9.状态栏显示该页状态 <base onm ouseover="window.status=‘网站建设 http://www.webmake.cn/‘ ;return true">

10.可以点击文字实现radio选项的选定 <br>     <input type="radio" name="regtype" value=http://www.mamicode.com/"A03" id="A03"> 情侣 : 一次注册两个帐户

11.可以在文字域的font写onclick事件

12.打印</a>打印网页 <a href=‘javascript:window.print ()‘>

13.线型输入框 <input type="text" name="key" size="12" value=http://www.mamicode.com/"关键字" onFocus=this.select() onm ouseOver=this.focus()

class="line">

14.显示文档最后修改日期 <script language=javascript> function hi(str) { document.write(document.lastModified)

alert("hi"+str+"!") } </script>

15.可以在鼠标移到文字上时就触发事件 <html> <head> <script language="LiveScript"> <!-- Hiding function hello() { alert("哈罗!"); } </script> </head> <body> <a href=http://www.mamicode.com/"" onm ouseOver="hello()">link

16.可以根据网页上的选项来确定页面颜色 <HTML> <HEAD> <TITLE>background.html</TITLE> </HEAD> <SCRIPT> <!--

function bgChange(selObj) { newColor = selObj.options[selObj.selectedIndex].text; document.bgColor = newColor; selObj.selectedIndex = -1; }

//--> </SCRIPT> <BODY STYLE="font-family:Arial"> <B>Changing Background Colors</B> <BR> <FORM> <SELECT SIZE="8" onChange="bgChange(this);"> <OPTION>Red <OPTION>Orange <OPTION>Yellow <OPTION>Green <OPTION>Blue <OPTION>Indigo <OPTION>Violet <OPTION>White <OPTION>pink </SELECT> </FORM> </BODY> </HTML>

17.将按钮的特征改变 <style type="text/css"> <!-- .style1 { font-size: 12px; background: #CCCCFF; border-width: thin thin thin thin; border-color: #CCCCFF

#CCCCCC #CCCCCC #CCCCFF} .style2 { font-size: 12px; font-weight: bold; background: #CCFFCC; border-width: thin medium medium thin;

border-color: #CCFF99 #999999 #999999 #CCFF99} --> </style> 　　本例按钮的代码如下： <input type="submit" name="Submit" value=http://www.mamicode.com/"提交" onm ouseover="this.className=‘style2‘"

onmouseout="this.className=‘style1‘" class="style1">

18.改变按钮的图片. <style type="text/css"> <!-- .style3 { font-size: 12px; background: url(image/buttonbg1.gif); border: 0px; width: 60px; height: 22px} .style4 { font-size: 12px; font-weight: bold; background: url(image/buttonbg2.gif); border: 0px 0; width:

60px; height: 22px} --> </style> 　　本例的按钮代码如下： <input type="submit" name="Submit2" value=http://www.mamicode.com/"提交" onm ouseover="this.className=‘style4‘"

onmouseout="this.className=‘style3‘" class="style3">

19.打印页面 <div align="center"><a class="content" href="javascript:doPrint();">打印本稿</a></div>

20.可以直接写html语言 document.write("");

21.改变下拉框的颜色 <select name="classid"

onChange="changelocation(document.myform.classid.options[document.myform.classid.selectedIndex].value)"

size="1" style="color:#008080;font-size: 9pt">

22.转至目标URL window.location="http://guoguo"

23.传递该object的form UpdateSN(‘guoqiang99267‘,this.form) function UpdateSN(strValue,strForm) { strForm.SignInName.value = http://www.mamicode.com/strValue; return false; }

24.文字标签 <label for="AltName4"><input name="AltName" type="RADIO" tabindex="931" id="AltName4"

>guoqiang99859</label>

25.layer2为组件的ID，可以控制组件是否可见 document.all.item(‘Layer2‘).style.display = "block"; document.all.item(‘Layer2‘).style.display = "none";//

26.将页面加入favorite中 <script language=javascript>  </script>//

27.过10秒自动关闭页面 < script language="JavaScript" > function closeit() { setTimeout("self.close()"，10000) } < /script >

28.可以比较字符的大小 char=post.charAt(i); if(!(‘0‘<=char&&char<=‘9‘))

29.将字符转化为数字 month = parseInt(char)

30.点击value非空的选项时转向指定连接 <select onchange=‘if(this.value!="")window.open(this.value)‘ class="textinput"> <option selected>主办单位</option> <option>-----------------</option> <option value=http://www.mamicode.com/"http://www.bjd.com.cn/">北京日报>

31.改变背景颜色 <td width=* class="dp" bgColor=#FAFBFC onm ouseover="this.bgColor=‘#FFFFFF‘;"

onmouseout="this.bgColor=‘#FAFBFC‘;">

32.改变文字输入框的背景颜色 <style> .input2 {background-image: url(‘../images/inputbg.gif‘); font-size: 12px; background-color:

#D0DABB;border-top-width:1px; border-right-width: 1px; border-bottom-width: 1px; border-left-width: 1px} </style> <input name=content type=text size="47" class="input2" maxlength="50">

33.改变水平线的特征 <hr size="0" noshade color="#C0C0C0">

34.传递参数的方式 <a href=http://www.mamicode.com/"vote.asp?CurPage=8&id=3488">8

35.页内跳转 <a href=http://www.mamicode.com/"#1">1 2 3 4 5 6 7 dfdf dfdf//

36.两个按键一起按下 if(event.ctrlKey && window.event.keyCode==13)//

37.刷新页面 javascript:this.location.reload()//

38.将网页的按钮使能 <SCRIPT LANGUAGE="JavaScript"> function haha() { for(var i=0;i<document.form1.elements.length;i++) { if(document.form1.elements[i].name.indexOf("bb")!=-1) document.form1.elements[i].disabled=!document.form1.elements[i].disabled; } } </SCRIPT> <BODY><form name=form1> <INPUT TYPE="button" NAME="aa " value=http://www.mamicode.com/cindy onclick=haha()>

39.文字移动 <marquee scrollamount=3 onm ouseover=this.stop(); onm ouseout=this.start();>

40.双击网页自动跑 <SCRIPT LANGUAGE="JavaScript"> var currentpos,timer; function initialize() { timer=setInterval("scrollwindow()",1); } function sc() { clearInterval(timer); } function scrollwindow() { currentpos=document.body.scrollTop; window.scroll(0,++currentpos); if (currentpos != document.body.scrollTop) sc(); } document.onmousedown=sc document.ondblclick=initialize </SCRIPT>//

41.后退 <INPUT TYPE="button" onclick=window.history.back() value=http://www.mamicode.com/back>

42.前进 <INPUT TYPE="button" onclick=window.history.forward() value=http://www.mamicode.com/forward>

43.刷新 <INPUT TYPE="button" onclick=document.location.reload() value=http://www.mamicode.com/reload>

44.转向指定网页 document.location="http://ww"或者document.location.assign("http://guoguo.com")

45.在网页上显示实时时间 <SCRIPT LANGUAGE="JavaScript"> var clock_id; window.onload=function() { clock_id=setInterval("document.form1.txtclock.value=http://www.mamicode.com/(new Date);",1000) } </script>//

46.可以下载文件 document.location.href=http://www.mamicode.com/"目标文件"//

47.连接数据库 import java.sql.*; String myDBDriver="sun.jdbc.odbc.JdbcOdbcDriver"; Class.forName(myDBDriver); Connection conn=DriverManager.getConnection("jdbc:odbc:firm","username","password"); Statement stmt=conn.createStatement(); ResultSet rs=stmt.executeQuery(sql); rs.getString("column1");//

48.可以直接在页面“div”内写下所需内容 <INPUT TYPE="button" onclick="a1.innerHTML=‘<font color=red>*</font>‘"> <div id=a1></div>//

49.可以改变页面上的连接的格式，使其为双线 <style> A:link {text-decoration: none; color:#0000FF; font-family: 宋体} A:visited {text-decoration: none; color: #0000FF; font-family: 宋体} A:hover {text-decoration: underline overline; color: FF0000} </style>

SCROLLBAR-3DLIGHT-COLOR: #000000; LINE-HEIGHT: 15pt; SCROLLBAR-ARROW-COLOR: #ffffff;

SCROLLBAR-TRACK-COLOR: #e7e7e7;}

INPUT{BORDER-TOP-WIDTH: 1px; PADDING-RIGHT: 1px; PADDING-LEFT: 1px; BORDER-LEFT-WIDTH: 1px; FONT-SIZE:

9pt; BORDER-LEFT-COLOR: #cccccc; BORDER-BOTTOM-WIDTH: 1px; BORDER-BOTTOM-COLOR: #cccccc; PADDING-BOTTOM: 1px; BORDER-TOP-COLOR: #cccccc;

PADDING-TOP: 1px; HEIGHT: 18px; BORDER-RIGHT-WIDTH: 1px; BORDER-RIGHT-COLOR: #cccccc} DIV,form ,OPTION,P,TD,BR{FONT-FAMILY: 宋体; FONT-SIZE: 9pt} textarea, select {border-width: 1; border-color: #000000; background-color: #efefef; font-family: 宋体;

font-size: 9pt; font-style: bold;} .text { font-family: "宋体"; font-size: 9pt; color: #003300; border: #006600 solid; border-width: 1px 1px

1px 1px} </style>完整的css

50.新建frame <a

href="javascript:newframe(‘http://www.163.net/help/a_little/index.html‘,‘http://www.163.net/help/a_little

/a_13.html‘)"><img alt=帮助 border=0 src=http://www.mamicode.com/"http://bjpic.163.net/images/mail/button-help.gif">

51.向文件中写内容 <%@ page import="java.io.*" %> <% String str = "print me"; //always give the path from root. This way it almost always works. String nameOfTextFile = "/usr/anil/imp.txt"; try { PrintWriter pw = new PrintWriter(new FileOutputStream(nameOfTextFile)); pw.println(str); //clean up pw.close(); } catch(IOException e) { out.println(e.getMessage()); } %>

52.先读文件再写文件 <%@ page language = "java" %> <%@ page contentType = "text/html; charSet=gb2312" %> <%@ page import ="java.util.*" %> <%@ page import ="java.lang.*" %> <%@ page import ="javax.servlet.*" %> <%@ page import ="javax.servlet.jsp.*" %> <%@ page import ="javax.servlet.http.*" %> <%@ page import="java.io.*" %> eryrytry <% int count=0; FileInputStream fi =new FileInputStream ("count.txt"); ObjectInputStream si= new ObjectInputStream (fi); count =si.readInt(); count++; out.print(count); si.close();

FileOutputStream fo =new FileOutputStream ("count.txt"); ObjectOutputStream so= new ObjectOutputStream (fo); so.writeInt(count); so.close(); %>

53.直线型输入框 <INPUT name=Password size=10 type=password style="border-left-width: 0; border-right-width: 0;

border-top-width: 0; border-bottom-style: solid; border-bottom-width: 1; background-color: #9CEB9C">

54.可以将背景改为按钮性状，通过改变css改变属性 <td width="65" align="center" bgcolor="#E0E0E0" onm ouseover=this.className=‘mouseoverbt‘;

onmouseout=this.className=‘mouseout‘;><a href=http://www.mamicode.com/"tm.asp?classid=76">

color="#000000">录音笔</font></a></td> <style> .mouseoverbt { background-image: url(http://www.yongle.com.cn/img/btbgw64h20y.gif); background-repeat: no-repeat; } .mouseout { background-color: #E0E0E0; } </style>

55.同时按下CTRL和Q键 document.onkeydown=function() { if(event.ctrlKey&&event.keyCode==81) {alert(1)} }//

56.以下是一个完整的显示hint的代码，其思想是当鼠标停留是将div中的内容显示在鼠标出，当鼠标移出后在将该div隐

藏掉 ---------------------------------------------------------------------------------------------------------

------------ <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML> <style> #hint{ width:198px; border:1px solid #000000; background:#99ff33; position:absolute; z-index:9; padding:6px; line-height:17px; text-align:left; top: 1520px; } </style> <SCRIPT LANGUAGE="JavaScript">  </SCRIPT> <BODY> <text id=guoguo value=http://www.mamicode.com/ga>

------------

57.弹出窗口方法一：<body onl oad="openwen()"> 浏览器读页面时弹出窗口；方法二：<body onunload="openwen()"> 浏览器离开页面时弹出窗口；方法三：用一个连接调用：<a href=http://www.mamicode.com/"#" onclick="openwin()">打开一个窗口注意：使用的"#"是虚连接。方法四：用一个按钮调用：何时装载script

58.动态改变字体的大小 function doZoom(size) { document.getElementById(‘zoom‘).style.fontSize=size+‘px‘ }

function aa() { var newWin=window.open(url); newWin.document.form1.text1.value=http://www.mamicode.com/value1; }改变弹出窗口上域的属性 opener.document.form2.text2.value=value2;改变父窗口的域的值

59.判断是何种浏览器 var name = navigator.appName; if (name == "Microsoft Internet Explorer") alert("IE"); else if (name == "Netscape") alert("NS");//

60.vbsscript确定框 <script language="VBScript">  </script>//

61.复制内容到剪切板 function JM_cc(bb) { var ob=eval("document.form1."+bb); ob.select(); js=ob.createTextRange(); js.execCommand("Copy"); }//

62.java中建立数据库连接取数据 public void init() { String url="jdbc:odbc:javadata"; try { Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); Connection con=DriverManager.getConnection(url,"sa","");//mssql database user SA and password DatabaseMetaData dma=con.getMetaData(); System.out.println("Connect to"+dma.getURL()); System.out.println(";Driver "+dma.getDriverName()); System.out.println(";Version "+dma.getDriverVersion()); System.out.println(""); Statement stmt=con.createStatement(); ResultSet rs=stmt.executeQuery("select * from company.dbo.TB_NAME where number=1");//Sql rs.next(); String dispresult=rs.getString("name"); System.out.println(dispresult);// Instead,you can display it in Paint() or use AWT etc. rs.close(); stmt.close(); con.close(); } catch(SQLException ex) { System.out.println("!!!SQL Exception !!!"); while(ex!=null) { System.out.println("SQLState:"+ex.getSQLState()); System.out.println("Message:"+ex.getMessage()); System.out.println("Vendor:"+ex.getErrorCode()); ex=ex.getNextException(); System.out.println(""); }

} catch(java.lang.Exception ex) { ex.printStackTrace(); } }//

63.最小化窗口 window.blur()//

64.文档的路径 document.URL//

65.定时执行某段程序 setTimeout("change_color()",600);

66.设置为主页 function makeHome(){ netscape.security.PrivilegeManager.enablePrivilege("UniversalPreferencesWrite"); navigator.preference("browser.startup.homepage", location.href); }//

67.设置为收藏 function addFav(){ if(ie) window.external.AddFavorite(location.href,‘WWW.OGRISH.COM : GROTESQUE MOVIES AND PICTURES‘); if(ns) alert("Thanks for the bookmark!/n/nNetscape users click OK then press CTRL-D"); }//

68.判断cookie是否可用 navigator.cookieEnabled;//

69.显示有模式的有页面的弹出窗口 function setbgcolor_onclick() { var color = showModalDialog("/mailpage/compose/colorsel.html",0,"help=0"); if (color != null) { document.compose.bgcolor.value = http://www.mamicode.com/color; } }//

70.截取小数点后两位 var a=3454545.4454545; alert(a.toFixed(2));//

71.禁止选择页面上的文字来拷贝 <script> function noEffect() { with (event) { returnValue = http://www.mamicode.com/false; cancelBubble = true; } return; } </script> <body onselectstart="noEffect()" oncontextmenu="noEffect()">//

72.屏蔽右键菜单 oncontextmenu="event.returnValue = http://www.mamicode.com/false"//

73.事件禁止起泡 event.cancelBubble = true//

74.禁止在输入框打开输入法 <input style="ime-mode: disabled">//

75.屏蔽汉字和空格 <input name="txt"><input type="submit" onClick="alert(!/[^ -}]|/s/.test(txt.value))">//

76.用javascript判断文件是否存在 function Exists(filespec) { if (filespec) { var fso; fso = new ActiveXObject("Scripting.FileSystemObject"); alert(fso.FileExists(filespec)); } } 选择图片 <input type=file name=f1><p> <input type="submit" onClick="Exists(f1.value)">//

77.获得当前的文本框选中的文字 <input onm ouseup="alert(document.selection.createRange().text)" value=http://www.mamicode.com/123>//

78.跳转至目标页面，同时不可返回 <a href="javascript:location.replace(‘http://www.sohu.com/‘)">sohu.com</a>//

79.获得当前的行是表格的第几行 <script> function getrow(obj) { if(event.srcElement.tagName=="TD"){ curRow=event.srcElement.parentElement; alert("这是第"+(curRow.rowIndex+1)+"行");

} } </script>

<table border="1" width="100%" onclick=getrow(this)> <tr> <td width="20%">　</td> <td width="20%">　</td> <td width="20%">　</td> <td width="20%">　</td> <td width="20%">　</td> </tr> <tr> <td width="20%">　</td> <td width="20%">　</td> <td width="20%">　</td> <td width="20%">　</td> <td width="20%">　</td> </tr> </table>//

80.删除表格某行，xx表示某行，下标从0开始计算 document.all.myTable.deleteRow(xx)//

81.动态的向表格中添加行 <table id="t1" border="1"> </table> <script language="JavaScript"> function add() { t1.insertRow().insertCell().innerHTML = ‘<input name="test‘+t1.rows.length+‘">‘; }//

82.event.x,event.clientX,event.offsetX区别： x:设置或者是得到鼠标相对于目标事件的父元素的外边界在x坐标上的位置。 clientX:相对于客户区域的x坐标位置，不

包括滚动条，就是正文区域。 offsetx：设置或者是得到鼠标相对于目标事件的父元素的内边界在x坐标上的位置。 screenX:相对于用户屏幕。

83.显示是鼠标按钮的哪个 <body onm ouseDown="alert(event.button)">点Mouse看看//

84.打开C盘 <form action="file:///c|/"><input type="submit" value=http://www.mamicode.com/"c:/ drive">// 85.当前屏幕的分辨率 screen.width、screen.height//

86.设置表格中的内容 tbl.rows[0].cells[1].innerText=document.form.text1.value;//

87.本地快捷键 <p><a href=http://www.mamicode.com/"file:///::{208D2C60-3AEA-1069-A2D7-08002B30309D}" target="_blank">网上邻居

target="_blank">控制面板</a></p> <p><a href=http://www.mamicode.com/"file:///::{7007ACC7-3202-11D1-AAD2-00805FC1270E}">拨号网络(windows 2000)

88.IE菜单 <button onclick="min.Click()"><font face="webdings">0</font></button>//改变按钮上的图片 <input type=button onclick="document.execCommand(‘CreateLink‘,‘true‘,‘true‘)"> //创建新连接 <input type=button onclick="document.execCommand(‘print‘,‘true‘,‘true‘)"> //打印 <input type=button onclick="document.execCommand(‘saveas‘,‘true‘,‘网站制作.htm‘)">//另存为htm <input type=button onclick="document.execCommand(‘saveas‘,‘true‘,‘网站制作.txt‘)">//另存为txt document.execCommand("SaveAs")//保存为 document.execCommand(‘undo‘)//撤销上一次操作

89.web对话框 <SCRIPT> var contents=‘<style>body,td{font:menu}img{cursor:hand}</style>‘; contents+=‘<title>你要关闭我吗</title>‘; contents+=‘<body bgcolor=menu>‘; contents+=‘<table width=100% height=100% border=0>‘; contents+=‘<tr><td align=center>‘; contents+=‘你要关闭我吗？<br>‘; contents+=‘<img src=http://www.mamicode.com/dark.gif onclick=self.close() alt="...关闭">‘; contents+=‘‘; contents+=‘‘; showModalDialog("about:"+contents+"","","dialogHeight:50px;dialogWidth:250px;help:no;status:no")>

90.取第x,y的值 <button onclick="t1.rows[x].cells[y].innerText=‘guoguo‘"></button>//

91.向新打开的网页上写内容 newwin=window.open(‘about:blank‘,‘‘,‘top=10‘); newwin.document.write(‘‘);//

93.返回 javascript:history.go(-2);//

94.将页面上选中的内容复制到剪贴板 abcdefg <input type=‘button‘

onclick="window.clipboardData.setData(‘text‘,document.selection.createRange().text);" value=http://www.mamicode.com/‘复制页面选中

的字符‘>// 95.将页面上选中的内容复制到剪贴板 <INPUT TYPE="text" NAME="">kjhkjhkhkj<INPUT TYPE="button" onclick="document.execCommand(‘Copy‘, ‘false‘,

null);">////

96.鼠标移到下拉框时自动全部打开 <select onm ouseover="javascript:this.size=this.length" onm ouseout="javascript:this.size=1"></select>//

97.获得本机的文件 var fso = new ActiveXObject("Scripting.FileSystemObject"); var f1 = fso.GetFile("C://bsitcdata//ejbhome.xml"); alert("File last modified: " + f1.DateLastModified); //

98.判断客户端是否是IE浏览器因为 document.all 是 IE 的特有属性，所以通常用这个方法来判断客户端是否是IE浏览器 ,document.all?1:0;

99.创建新的下拉框选项 new Option(text,value)这样的函数//

100.在页面上画柱状图 <STYLE> td{font-size:12px} body{font-size:12px} v/:*{behavior:url(#default#VML);} //这里声明了v作为VML公用变量 </STYLE> <SCRIPT LANGUAGE="JavaScript"> mathstr=12; document.write ("<v:rect fillcolor=‘red‘

style=‘width:20;color:navy;height:"+5000/(1000/mathstr)+"‘><br> %"+mathstr+"<br>4人<v:Extrusion

backdepth=‘15pt‘ on=‘true‘/></v:rect>") </SCRIPT> <v:rect fillcolor=‘red‘ style=‘width:20;color:navy;height:200‘><br>%12<br>4人<v:Extrusion

backdepth=‘15pt‘ on=‘true‘/></v:rect> <v:rect fillcolor=‘yellow‘ style=‘width:20;color:navy;height:100‘><br>%12<br>4人<v:Extrusion

backdepth=‘15pt‘ on=‘true‘/></v:rect>//

101.饼图 <style> v/:* { behavior: url(#default#VML) } o/:* { behavior: url(#default#VML) } .shape { behavior: url(#default#VML) } </style> <script language="javascript"> function show(pie) { pie.strokecolor=pie.fillcolor; pie.strokeweight=10; div1.innerHTML="<font size=2 color=red> " + pie.id +"</font> <font size=2>" + pie.title + "</font>"; } function hide(pie) { pie.strokecolor="white"; pie.strokeweight=1; div1.innerHTML=""; } </script> </head> <body> <v:group style=‘width: 5cm; height: 5cm‘ coordorigin=‘0,0‘ coordsize=‘250,250‘> <v:shape id=‘asp技术‘ style=‘width:10;height:10;top:10;left:0‘ title=‘得票数:6 比例:40.00%‘