JavaScript基础教程之常用的JavaScript代码（5）-职坐标

JavaScript基础教程之常用的JavaScript代码（5）

沉沙 2019-04-11 来源：阅读 976 评论 0

摘要：本篇文章探讨了JavaScript基础教程之常用的JavaScript代码（5），希望阅读本篇文章以后大家有所收获，帮助大家对相关内容的理解更加深入。

本篇文章探讨了JavaScript基础教程之常用的JavaScript代码（5），希望阅读本篇文章以后大家有所收获，帮助大家对相关内容的理解更加深入。

JavaScript基础教程之常用的JavaScript代码（5）

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="//www.bjd.com.cn/">北京日报</option>
<option value="//www.ben.com.cn/">北京晚报</option>
</select>
31.改变背景颜色
<td width=* bgColor=#FAFBFC onmouseover="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" 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="vote.asp?CurPage=8&id=3488">8</a>
35.页内跳转
<a href="#1">1</a>
<a href="#2">2</a>
<a href="#3">3</a>
<a href="#4">4</a>
<a href="#5">5</a>
<a href="#6">6</a>
<a href="#7">7</a>
<a name="1">dfdf</a>
<a name="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
<SCRIPT LANGUAGE="JavaScript">
function haha()
{
for(var i=0;i<document.form1.elements.length;i++)
{
if(document.form1.elements.name.indexOf("bb")!=-1)
document.form1.elements.disabled=!document.form1.elements.disabled;
}
}
</SCRIPT>
<BODY><form name=form1>
<INPUT TYPE="button" NAME="aa " value=cindy onclick=haha()>
<INPUT TYPE="button" NAME="bb " value=guoguo>
<INPUT TYPE="button" NAME="bb " value=guoguo>
39.文字移动
<marquee scrollamount=3 onmouseover=this.stop(); onmouseout=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=back>
42.前进
<INPUT TYPE="button" onclick=window.history.forward() value=forward>
43.刷新
<INPUT TYPE="button" onclick=document.location.reload() value=reload>
44.转向指定网页
document.location="//ww"或者document.location.assign("//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=(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
<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>
<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 1px
1px 1px}
</style>完整的css
50.新建frame
<a
href="javascript:newframe(‘//www.163.net/help/a_little/index.html‘,‘//www.163.net/help/a_little
/a_13.html‘)"><img alt=帮助 border=0 src="//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();
%>