JS实例

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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<inputtype="text" value="mm" onfocus="if(value=='mm) {value=''}" onblur="if(value=='') {value='mm'}">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<inputtype=buttonname="Submit1" value="郭强" size=10class=s02style="background-color:rgb(235,207,22)">

3.鼠标移入移出时颜色变化<inputtype="submit" value="找吧" name="B1" onMouseOut=this.style.color="blue"onMouseOver=this.style.color="red"class="button">

4.平面按钮<inputtype=submitvalue=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<inputtype=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<inputtype="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<marqueedirection=upscrollamount=1scrolldelay=100onmouseover='this.stop()'onmouseout='this.start()'height=60><tr><td>共和国</table></marquee>

9.状态栏显示该页状态<baseonmouseover="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>    <inputtype="radio" name="regtype" value="A03" id="A03"><labelfor="A03"> 情侣 : 一次注册两个帐户</label><br>

11.可以在文字域的font写onclick事件

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

13.线型输入框<inputtype="text" name="key" size="12" value="关键字" onFocus=this.select()onMouseOver=this.focus()class="line">

14.显示文档最后修改日期<scriptlanguage=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><scriptlanguage="LiveScript"><!-- Hiding function hello() { alert("哈罗!"); }</script></head><body><ahref="" onMouseOver="hello()">link</a></body></html>

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></SCRIPT><BODYSTYLE="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<styletype="text/css"></style>　　本例按钮的代码如下：<inputtype="submit" name="Submit" value="提交" onmouseover="this.className='style2'"onmouseout="this.className='style1'" class="style1">

18.改变按钮的图片.<styletype="text/css"></style>　　本例的按钮代码如下：<inputtype="submit" name="Submit2" value="提交" onmouseover="this.className='style4'"onmouseout="this.className='style3'" class="style3">

19.打印页面<divalign="center"><aclass=contenthref="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<selectname="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URLwindow.location=http://guoguo

23.传递该object的formUpdateSN('guoqiang99267',this.form)function UpdateSN(strValue,strForm){ strForm.SignInName.value = strValue; return false;}

24.文字标签<labelfor="AltName4"><inputname="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<scriptlanguage=javascript></script>//

27.过10秒自动关闭页面< scriptlanguage="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.bjd.com.cn/">北京日报</option><option value="http://www.ben.com.cn/">北京晚报</option></select>

31.改变背景颜色<tdwidth=* class=dp bgColor=#FAFBFConmouseover="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><inputname=contenttype=text size="47" class="input2" maxlength="50">

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

34.传递参数的方式<ahref="vote.asp?CurPage=8&id=3488">8</a>

35.页内跳转<ahref="#1">1</a><ahref="#2">2</a><ahref="#3">3</a><ahref="#4">4</a><ahref="#5">5</a><ahref="#6">6</a><ahref="#7">7</a><aname="1">dfdf</a><aname="2">dfdf</a>//

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<SCRIPTLANGUAGE="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><formname=form1><INPUTTYPE="button" NAME="aa " value=cindyonclick=haha()><INPUTTYPE="button" NAME="bb " value=guoguo><INPUTTYPE="button" NAME="bb " value=guoguo>

39.文字移动<marqueescrollamount=3onmouseover=this.stop();onmouseout=this.start();>

40.双击网页自动跑<SCRIPTLANGUAGE="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=scdocument.ondblclick=initialize</SCRIPT>//

41.后退<INPUTTYPE="button" onclick=window.history.back()value=back>

42.前进<INPUTTYPE="button" onclick=window.history.forward()value=forward>

43.刷新<INPUTTYPE="button" onclick=document.location.reload()value=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<SCRIPTLANGUAGE="JavaScript">var clock_id;window.onload=function(){ clock_id=setInterval("document.form1.txtclock.value=(new Date);",1000)}</SCRIPT>//

46.可以下载文件document.location.href="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<INPUTTYPE="button" onclick="a1.innerHTML='<font color=red>*</font>'"><divid=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><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 line-through; color: FF0000}TH{FONT-SIZE: 9pt}TD{FONT-SIZE: 9pt}body{SCROLLBAR-FACE-COLOR: #A9D46D; SCROLLBAR-HIGHLIGHT-COLOR: #e7e7e7;SCROLLBAR-SHADOW-COLOR:#e7e7e7;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 1px1px 1px}</style>完整的css

50.新建frame<ahref="javascript:newframe('http://www.163.net/help/a_little/index.html','http://www.163.net/help/a_little/a_13.html')"><imgalt=帮助 border=0 src="http://bjpic.163.net/images/mail/button-help.gif"></a>

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" onmouseover=this.className='mouseoverbt';

onmouseout=this.className='mouseout';><a href="tm.asp?classid=76"><font

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=ga>
<a href=# onmouseover=showme() onmouseout=hidme() onmousemove=showme() son=hint>dfdfd</a>
<div id=hint style="display:none"></div>
</BODY>
</HTML>
---------------------------------------------------------------------------------------------------------

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

57.弹出窗口
方法一：<body onload="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="#" onclick="openwin()">打开一个窗口</a>
注意：使用的"#"是虚连接。
方法四：用一个按钮调用：<input type="button" onclick="openwin()" value="打开窗口"> 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=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 = 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 = false;
cancelBubble = true;
}
return;
}
</script>
<body onselectstart="noEffect()" oncontextmenu="noEffect()">//

72.屏蔽右键菜单
oncontextmenu="event.returnValue = 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 onmouseup="alert(document.selection.createRange().text)" value=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+'">';
}//