事半功倍系列javascript，二
第七章 使用对象
1.理解对象\属性和方法
1 <body bgcolor="green">
2 <script>
3 document.write("页面背景颜色是:"+document.bgColor)
4 document.write("页面前景颜色是:"+document.fgColor)
5 </script>
2.使用网页元素对象1 <script>
2 </script>
3 <form name=form1>
4 <textarea name=ta1>dfgfdgfdhfdhdfdfgdf</textarea>
5 <input type=button value="选择文本" onclick=document.form1.ta1.select()>
6 <input type=button value="显示文本" onclick=document.write(document.form1.ta1.value)>
7 </form>
3.使用子对象1 <form name=form1>
2 <input type=text name=text1 value=hello>
3 </form>
4 <script>
5 document.form1.text1.value="gdfgfd"
6 </script>
7
8 <form name=form1>
9 <input type=radio name=radio1>男
10 <input type=radio name=radio2>女
11 </script>
12 <script>
13 document.form1.radio1.checked=true
14 </script>
4.使用预定义对象1 <script>
2 str1="dgdfgdfgdfhf固定法固定法功夫攻打法"
3 document.write(str1+"<br>")
4 str2=str1.substr(5)
5 document.write(str2+"<br>")
6 document.write("输出圆的面积:"+Math.PI*Math.pow(5.0,2))
7 </script>
5.创建新对象1 <script>
2 today=new Date()
3 document.write("今天是"+(today.getMonth()+1)+"月"+today.getDate()+"日"+"<br>")
4 document.write("现在是:"+today.toLocaleString())
5 </script>
6.引用当前对象1 <form name=form1>
2 <input type=text name=text1 value="dgdgdfgfd" onclick=this.select()>
3 </script>
7.查看对象属性1 <script>
2 for(prop in window)
3 {document.write("window."+prop+"="+window[prop]+"<br>");}
4 for(prop2 in location)
5 {document.write("location."+prop2+"="+location[prop]+"<br>");}
6 </script>
8.使用Array对象1 <script>
2 array=new Array(10)
3 array[0]="bark"
4 array[1]="apple"
5 array[2]="nebula"
6 array[3]="cookie"
7 array[4]="technology"
8 document.write("数组元素个数是"+array.Length+"<br>")
9 document.write("用 join将数组合并"+array.join(" ")+"<br>")
10 document.write(" 数组排序"+array.sort())
11 </script>
9.使用 image 对象1 <img src=**.gif alt="图片提示…." 图片提示是:"+document.images[0].alt+"<br>")
4 document.write("图片边框大小是:"+document.images[0].broder)
5 </script>
10.预加载图像1 <script>
2 freddy=new Image()
3 freddy.src=freddy.gif
4 </script>
5 <body onload=document.images[0].src=freddy.src>
6 ,<img src="blank.gif">
7 </body>
11.改变图像1 <img src=freddy.gif><br>
2 <form name=form1>
3 <input type=button name=button1 value="改变图像" onclickd=document.images[0].src=dudjp.gif>
4 </form>
12.使用link和anchor对象1 <a name=anchor1>锚点1<br>
2 <a href=http://www.microsoft.com>Microsoft</a><br>
3 <a href=http://www.sohu.com>sohu</a><br>
4 <a href=http://www.sina.com.cn>sina</a><br>
5 <script>
6 document.write("本页面共有"+document.links.length+"链接"+"<br>")
7 document.write("本页面共有"+document.anchors.length+"锚点"+"<br>")
8 document.write("第一个链接协议是"+document.links[0].protocol+"<br>")
9 document.write("第一个链接路径是"+document.links[0].pathnamel+"<br>")
10 document.write("第一个链接href是"+document.links[0].hrefl+"<br>")
11 </script>
13.改变链接1 <a href =http://www.microsoft.com>link</a>
2 <form name=form1>
3 <input type=button name=button1 value="改变链接" onclick=document.links[0].href='http://www.sohu.com'>
4 </form>
14.使用history对象1 <form name=form1>
2 <input type=button name=button1 value="向后返回2页" onclick=window.history.go(-2)>
3 </form>
第八章 使用窗口
1.在浏览器的状态栏上显示文本
1 <body onload=window.status="欢迎光临我的站点">
2 <a href=http://www.sohu.com>sohu</a>
3 </body>
2.改变背景色1 <script>
2 document.bgColor="orange"
3 </script>
3.列举背景颜色1 <body bgColor =green>
2 <script>
3 document.write("当前背景色是:"+document.bgColor)
4 </script>
5 </body>
4.改变文本和链接颜色1 <script>
2 document.bgColor="orange"
3 document.fgColor="blue"
4 document.linkColor="red"
5 </script>
6 <h2>看看这段文本颜色</h2>
7 <a href=http://www.sohu.com>sohu</a>
8 </body>
5.改变文档标题1 <script>
2 name="Mouse"
3 document.title="welcome to "+name+"'s House"
4 document.write(document.title)
5 </script>
6.显示修改日期1 <script>
2 document.write("本页面最后修改时间是"+document.lastModified)
3 </script>
7.查看当前文档的URL1 <script>
2 document.write("本页面的URL:"+document.URL)
3 </script>
8.查看引用页1 <script>
2 document.write("本页面的引用页是"+document.referrer)
3 </script>
9.打开新的浏览器窗口1 <script>
2 window.open("*.htm","title","width=200,height=400,resizable=yes")
3 </script>
10.关闭远程窗口1 close.html:
2 <script>
3 document.write("正文")
4 </script>
5 <form name=form1>
6 <input type=button name=button1value="关闭" onclick=window.close()>
7 </form>
8
9 open.html
10 <script>
11 window.open("close.html","romote","width=200,height=400,resizable=yes")
12 </script>
13
11.打印窗口1 <script>
2 document.write("正文")
3 </script>
4 <form name=form1>
5 <input type=button value=打印 onclick=window.print()>
6 </form>
12.移动窗口1 <form name=form1>
2 水平方向<input type=text name=x value=20>
3 垂直方向<input type=text name=y value=50>
4 <input type=button value="移动窗口到…"onclick=window.moveTo(document.form1.x.value,document.form1.y.value)>
5 </form>
6
7 <form name=form1>
8 水平方向<input type=text name=x value=20>
9 垂直方向<input type=text name=y value=50>
10 <input type=button value="移动窗口"onclick=window.moveBy(document.form1.x.value,document.form1.y.value)>
11 </form>
13.改变窗口大小1 <form name=form1>
2 水平方向<input type=text name=x value=200>
3 垂直方向<input type=text name=y value=500>
4 <input type=button value="改变窗口大小到….."onclick=window.resizeTo(document.form1.x.value,document.form1.y.value)>
5 </form>
6
7 <form name=form1>
8 水平方向<input type=text name=x value=200>
9 垂直方向<input type=text name=y value=500>
10 <input type=button value="改变窗口大小"onclick=window.resizeBy(document.form1.x.value,document.form1.y.value)>
11 </form>
14.用警告对话框通知用户1 <script>
2 window.alert("welcome")
3 </script>
15.用提示对话框接受输入1 <script>
2 name=window.prompt("输入姓名","姓名")
3 document.write(" 欢迎您:"+name+"来到这里")
4 </script>
16.用确认对话框使用户做出决定1 <script>
2 like=window.confirm("你觉得好吗?")
3 if(like==true)
4 document.write("谢谢你的夸奖")
5 else
6 document.write("希望得到你的夸奖")
7 </script>
第九章 使用字符串
1.使用字符串对象
1 <script>
2 mystring="gdgdfgfddddaaaaaaaaaaaabbbbbbbbbbbbbbbbbvbhg.<br>"
3 document.write(mystring)
4 document.write(mystring.bold())
5 document.write(mystring.toUpperCase())
6 </script>
2.使用子字符串1 <script>
2 str1="fdsf 1111 gfdgfd dfdsf cccc dddd.<br>"
3 document.write(str1)
4 document.write(str1.substring(0,13)+"<br>")
5 document.write(str1.substr (20,11)+"<br>")
6 </script>
3.连接字符串1 <script>
2 str1="may you find"
3 str2="peace,happiness and prosperity.<br>"
4 document.write(str1+"<br>")
5 document.write(str2)
6 document.write(str1.concat(str2))
7 document.write(str1+=str2)
8 </script>
4.格式化字符串变量1 <script>
2 str1="peace,happiness and prosperity.<br>"
3 document.write(str1)
4 document.write(str1.big())
5 document.write(str1.small())
6 document.write(str1.bold())
7 document.write(str1.italics())
8 document.write(str1.strike())
9 document.write(str1.fontsize(6))
10 document.write(str1.fontcolor(green))
11 </script>
5.创建锚和链接1 <script>
2 str1="this is the bigginning of the page.<br>"
3 str2="….<br>"
4 str3="this is the end of the page .<br>"
5 str4="link to the start<br>"
6 str5="link to the end<br>"
7 document.write(str1.anchor("start"))
8 for(i=0;i<10;i++)
9 document.write(str2);
10 document.write(str3.anchor("end"))
11 document.write(str4.link("#start"))
12 document.write(str5.link("#end"))
13 </script>
6.确定字符串长度1 <script>
2 str1="this is the bigginning of the page."
3 document.write(str1+"<br>")
4 document.write( "字符串的长度是:"+str1.length)
5 document.write("字符串全部大写是;"+str1.toUpperCase())
6 document.write("字符串全部小写是;"+str1.toLowerCase())
7 </script>
7.在字符串内搜索1 <script>
2 str1="this is the end of the line.<br>"
3 document.write(str1)
4 document.write("字符end在字符串的位置是"+str1.search("end"))
5 document.write("字符dog在字符串的位置是"+str1.search("dog"))
6 </script>
8.定位字符串中的字符1 <script>
2 str1="spring is a time for flowers and trees and baby bunnles<br>"
3 document.write(str1)
4 document.write("the index for the second word ‘and' is"+str1.indexOf("and",30))
5 documednt.write("the last index of the word ‘and' is "+str1.lastIndexOf("and"))
6 </script>
9.替换字符串中的文本1 <script>
2 str1="spring is a time for flowers and trees and baby bunnles<br>"
3 document.write(str1)
4 document .write(str1.replace("and",","))
5 </script>
10.字符串分离1 <script>
2 str1="spring is a time for flowers and trees and baby bunnles<br>"
3 document.write(str1)
4 str1array=str1.split(" ")
5 document.write(str1array[0]+"<br>")
6 document.write(str1array[1]+"<br>")
7 document.write(str1array[2]+"<br>")
8 document.write(str1array[3]+"<br>")
9 </script>
第十章 使用日期和时间
1.使用Date对象
1 <script>
2 cdate=new Date("august 2,1989 12:30:00")
3 document.write(cdate)
4 </script>
2.显示当地时间和日期1 <script>
2 cdate=new Date()
3 document.write("当前时间是:"+cdate.toGMTString()+"<br>")
4 document.write("日期和时间是:"+cdate.toLocaleString())
5 </script>
3.获得时间和日期值1 <script>
2 cdate=new Date()
3 document.write("显示当前的星期"+cdate.getDay()+"<br>")
4 document.write("显示当前的月份"+cdate.getMonth()+"<br>")
5 document.write("显示当前的日期"+cdate.getDay()+"<br>")
6 document.write("显示当前的年份"+cdate.getYear()+"<br>")
7 document.write("显示当前的小时"+cdate.getHours()+"<br>")
8 document.write("显示当前的分钟"+cdate.getMinutes()+"<br>")
9 document.write("显示当前的秒"+cdate.getSeconds()+"<br>")
10 </script>
4.设置时间和日期值1 <script language=javascript>
2 cdate=new Date("December 25,1984")
3 document.write("显示日期"+cdate+"<br>")
4 document.write("设置月份"+cdate.setMonth(10)+"<br>")
5 document.write("设置日期"+cdate.setDate(23)+"<br>")
6 document.write("设置年份"+cdate.setYear(2000)+"<br>")
7 document.write("设置小时"+cdate.setHours(13)+"<br>");
8 document.write("设置分钟"+cdate.setMinutes(47)+"<br>");
9 document.write("设置秒"+cdate.setSeconds(23)+"<br>");
10 document.write("显示设置后的日期和时间"+cdate);
11 </script>
第十一章 使用Math对象
1. 使用Math对象
1 <script language=javascript>
2 </script>
3 <form name=form1>
4 圆的半径:<input type=text name=rad><br>
5 圆的面积:<input type=text name=area><br>
6 <input type=button name=button1 value=计算圆的面积 onclick=document.form1.area.value=document.form1.rad.value*document.
7 form1.rad.value*Math.PI>
8 </form>
2.生成随机数1 <script>
2 array1=new Array(
3 "这是第1句",
4 "这是第2句",
5 "这是第3句",
6 "这是第4句",
7 "这是第5句",
8 "这是第6句")
9 RandomNo=Math.floor(array1.length*Math.random())
10 document.write("随机输出某一句"+"<br>"+array1[RandomNo])
11 </script>
3.使用平方根1 <form name=form1>
2 value:<input type=text name=va1><br>
3 平方根<input type=text name=sqrt><br>
4 <input type=button name=button1 value=计算平方根
5 onclick="document.form1.sqrt.value=Math.sqrt(document.form1.va1.value)">
6 </form>
4.数字的舍入1 <form name=form1>
2 输入<input type=text name=val><br>
3 舍入的结果<input type=text name=round><br>
4 <input type=button name=button1 value=计算结果 onclick=document.form1.round.value=Math.round(document.form1.val.value)>
5 </form>
5.乘方运算1 <form name=form1>
2 底数<input type=text name=val><br>
3 指数<input type=text name=power><br>
4 幂<input type=text name=result><br>
5 <input type=button name=button1 value=计算结果 onclick="document.form1.result.value=Math.pow (document.form1.val.value,document.form1.power.value)">
6 </form>
6.发现最小值和最大值1 <form name=form1>
2 数字1<input type=text name=val1><br>
3 数字2<input type=text name=val2><br>
4 最小值<input type=text name=min><br>
5 最大值<input type=text name=max><br>
6 数字1<input type=button value=计算 onclick="document.form1.min.value=Math.min (document.form1.val1.value,document.form1.val2.value);document.form1.
7 max.value= Math.max(document.form1.val1.value,document.form1.val2.value)">
8 </form>
第十二章 使用表单
1.使用文本框
1 <form name=form1>
2 <input type=text value="information ,please"name=text1>
3 </form>
4 <script>
5 document.write("表单text1类型是: "+document.form1.text1.type+"<br>")
6 document.write("表单text1名称是: "+document.form1.text1.name+"<br>")
7 document.write("表单text1值是: "+document.form1.text1.value+"<br>")
8 document.write("表单text1大小是: "+document.form1.text1.size+"<br>")
9 </script>
10
11 <form name=form1>
12 <input type=text name=text1 value=click here
13 onfocus=document.form1.text1.select()>
14 </form>
15
2.使用密码框1 <form name=form1>
2 <input type=password name=pw1 value=daylight>
3 </form>
4 <script>
5 document.write("表单pw1的类型:"+document.form1.pw1.type+"<br>")
6 document.write("表单pw1的名称:"+document.form1.pw1.name+"<br>")
7 document.write("表单pw1的值:"+document.form1.pw1.value+"<br>")
8 document.write("表单pw1的大小:"+document.form1.pw1.size+"<br>")
9 </script>
3.使用隐藏字段1 <form name=form1>
2 <input type=hidden name=hid1 value=piece of eight>
3 </form>
4 <script>
5 document.write("表单hid1的类型:"+document.form1.hid1.type+"<br>")
6 document.write("表单hid1的名称:"+document.form1.hid1.name+"<br>")
7 document.write("表单hid1的值:"+document.form1.hid1.value+"<br>")
8 </script>
4.使用文本区域框1 <form name=form1>
2 <textarea name=ta1>how many grains of sand are there in the sahara desert?</textarea>
3 </form>
4 <script>
5 document.write("表单ta1的类型:"+document.form1.ta1.type+"<br>")
6 document.write("表单ta1的名称:"+document.form1.ta1.name+"<br>")
7 document.write("表单ta1的值:"+document.form1.ta1.value+"<br>")
8 document.write("表单ta1的横向宽度:"+document.form1.ta1.cols+"<br>")
9 document.write("表单ta1的纵向宽度:"+document.form1.rows.value+"<br>")
10 </script>
6.使用重置按钮1 <form name=form1>
2 <input type=reset name=reset1 value="rest form">
3 </form>
4 <script>
5 document.write("表单reset1的类型:"+document.form1.reset1.type+"<br>")
6 document.write("表单reset1的名称:"+document.form1.reset1.name+"<br>")
7 document.write("表单reset1的值:"+document.form1.reset1.value+"<br>")
8 </script>
7.使用提交按钮1 <form name=form1>
2 <input type=submit name=submit1 value="submit form">
3 </form>
4 <script>
5 document.write("表单submit1的类型:"+document.form1.submit1.type+"<br>")
6 document.write("表单submit1的名称:"+document.form1.submit1.name+"<br>")
7 document.write("表单submit1的值:"+document.form1.submit1.value+"<br>")
8 </script>
8.使用复选按钮1 <form name=form1>
2 <input type=checkbox name=cb1 >computer savvy?
3 </form>
4 <script>
5 document.write("表单cb1的类型:"+document.form1.cb1.type+"<br>")
6 document.write("表单cb1是否被选择?:"+document.form1.cb1.checked+"<br>")
7 document.write("表单cb1的名称:"+document.form1.cb1.name+"<br>")
8 </script>
9.使用单选按钮1 <form name=form1>
2 <input type=radio name=radio1>male
3 <input type=radio name=radio1>female
4 </form>
5 <script>
6 document.write("第一个按钮被选择"+document.form1.radio1[0].checked+"<br>")
7 document.write("第二个按钮被选择"+document.form1.radio1[1].checked+"<br>")
8 document.write("按钮的名称"+ document.form1.radio1[0].name+"<br>")
9 document.write("按钮的个数"+document.form1.radio1.length)
10 </script>
10.使用选择列表1 <form name=form1>
2 <select name=select1 size=4>
3 <option name=option1 value=lon>london,England</option>
4 <option name=option2 value=dub>Dublin,Ireland</option>
5 </select>
6 </form>
7 <script>
8 document.write("这个选择列表的名称"+document.form1.select1.name+"<br>")
9 document.write("这个选择列表的长度"+document.form1.select1.length+"<br>")
10 document.write("这个选择列表当前被选择的索引号"+document.form1.select1.selectedIndex+"<br>")
11 document.write("这个选择列表的尺寸"+document.form1.select1.size+"<br>")
12 </script>
11.验证表单的有效性1 <script>
2 function validate(){
3 if(document.form1.text1.value!='1'||'2'||'3'||'4'){
4 alert("请输入1~4的整数")
5 }
6 }
7 </script>
8 <form name=form1>
9 请输入1~4的整数:
10 <input type=text name=text1 size=4 onchange=validate()>
11 </form>
12.控制表单焦点1 <form name=form1>
2 <input type=text name=text1 value=where is you focus?><br>
3 <input type=text name=text2 value=is there?><br>
4 <input type=text name=text3 value=or maybe here?><br>
5 <input type=button name=button1 value="text box #1" onclick=document.form1.text1.focus()><br>
6 <input type=button name=button2 value="text box #2" onclick=document.form1.text2.focus()><br>
7 <input type=button name=button3 value="text box #3" onclick=document.form1.text3.focus()><br>
8 </form>
第十四章 使用navigator
1.使用navigator对象
1 <script>
2 document.write("navigator对象的属性"+"<br>")
3 document.write("appcodename:"+navigator.appCodeName+"<br>")
4 document.write("appname::"+navigator.appName+"<br>")
5 document.write("appversion:"+navigator.appVersion+"<br>")
6 document.write("platform:"+navigator.platform+"<br>")
7 document.write("userAgent:"+navigator.userAgent+"<br>")
8 </script>
9 <script>
10 document.write("navigator对象的方法"+"<br>")
11 document.write("javaEnabled():"+navigator.javaEnabled())
12 </script>
2.检查用户的浏览器1 <script>
2 if(navigator.appName.indexOf("Microsoft")!=-1){
3 document.write("用户浏览器是微软的IE浏览器"+"<br>")}
4 else if(navigator.appName.indexOf("Netscape")!=-1){
5 document.write("用户浏览器是netscape的netscape浏览器"+"<br>")}
6 if(navigator.appVersion.indexOf("4.0")!=-1){
7 document.write("you are using a version 4.0compatible browser")
8 }
9 else{
10 document.write("this browser is not 4.0 compliant")}
11 </script>
3.检测用户的操作系统1 <script>
2 if (navigator.platform.indexOf("win32")!=-1){
3 document.write("you are using a computer running windows 95 or highter")}
4 else{
5 document.write("this computer is not running windows 95 or higher")}
6 </script>
4.使用location对象<script>
document.write("location对象的属性"+"<br>")
document.write("hash"+location.hash+"<br>")
document.write("hostname"+location.hostname+"<br>")
document.write("host"+location.host+"<br>")
document.write("href"+location.href+"<br>")
document.write("port"+location.port+"<br>")
document.write("search"+location.search+"<br>")
</script>
重新加载网页
<form name=form1>
<input type=button name=button1 value=重新加载本页 onclick=location.reload>
</form>
5.使用cookie1 <script>
2 finction makecookie(){
3 if(!document.cookie){
4 name=prompt("请输入你的姓名");
5 document.cookie="name="+name+";";}
6 }
7 </script>
8
9 <body onload=makecookie()>
10 <script>
11 function makecookie(){
12 if(!document.cookie){
13 name=prompt("请输入你的姓名")
14 document.cookie="name="+name+";";
15 namestart=document.cookie.indexOf("=");
16 nameend=document.cookieindexOf(";");
17 document.writeln("your name is:"+document.cookie.substring(namestart+1,nameend)+",br>")
18 }
19 }
20 </script>
21