清華大學出版的《事半功倍系列 javascript》,本人照著書敲出來的,有些翻譯了一下.前幾年看了一下,最近無事,重新翻了翻,很有幫助.本書應該有光盤的,但學校的書,光盤不知在哪.希望對你學 javascript有幫助
第一章javascript簡介
1.在地址欄輸入javascript語句
Javascript:Document.write("顯示文字")
2.將javascript嵌入 HTML文檔
<script language=javascript> document.bgColor="blue" </script>
第二章 使用變量和數組
1.聲明變量
<script language=javascripe> Var answer1,answer2,answer3,answer4; answer1=9; answer2=2.5 answer3="Milkey May" answer4=true </script>
2.使用整數
<script language=javascript> var decimalNum,hexadecimalNum,octalNum decimalNum=24 hexadecimalNum=0x24 octalNum=024 document.write("顯示十進制數:"+ decimalNum+"<br>") document.write("顯示十六進制數:"+ hexadecimalNum +"<br>") document.write("顯示八進制數:"+ octalNum +"<br>") </script>
3.使用浮點數
<script language=javascript> var num1,num2,num3,num4 num1=1234567890000.0 num2=5.14e23 num3=0.0000123456 num4=6.0254e3-4 document.write("浮點數1:"+num1+"<br>") document.write("浮點數2:"+num2+"<br>") document.write("浮點數3:"+num3+"<br>") document.write("浮點數4:"+num4+"<br>") </script>
4.使用布爾值
<script language=javascript> var answer1,answer2 answer1=true answer2=false document.write("顯示布爾1:"+answer1+"<br>") document.write("顯示布爾2:"+answer2+"<br>") </script>
5.使用字符串
<script language=javascript> var str1,str2 str1="fdsgdg dsfdsf china" str2="武漢市廣播電視大學" document.write("顯示字符串1:"+str1+"<br>") document.write("顯示字符串2:"+str2+"<br>") </script>
6.確定變量類型
<script> var answer1,answer2,answer3,answer4 answer1=9 answer2=2.5 answer3="milky may" answer4=true document.write("變量1的類型是:"+typeof answer1 +"<br>") document.write("變量2的類型是:"+typeof answer2 +"<br>") document.write("變量3的類型是:"+typeof answer3 +"<br>") document.write("變量4的類型是:"+typeof answer4 +"<br>") </script>
7.將字符串轉換成數字
<script> var str1="31 days in january" var int1=parseInt(str1) document.write("str1的數據類型是 :"+typeof str1+"<br>") document.write("int1的數據類型是 :"+typeof int1+"<br>") </script>
8.將數字轉換成字符串
<script> var int1=256 var str1=""+int1 document.write("str1的數據類型是 :"+typeof str1+"<br>") document.write("int1的數據類型是 :"+typeof int1+"<br>") </script>
9.聲明數組
<script> array=new Array(5) array[0]=1 array[1]=3 array[2]=5 array[3]=7 array[4]=11 document.write("數組是:"+array[0]+" "+array[1]+" "+array[2]+" "+array[3]+" "+array[4]) </script>
10.確定數組元素的個數
<script> array=new Array(5) array[0]=1 array[1]=3 array[2]=5 array[3]=7 array[4]=11 document.write("數組是:"+array[0]+" "+array[1]+" "+array[2]+" "+array[3]+" "+array[4]+"<br>") document.write("數組的元素個數是"+array.length) </script>
11.將數組轉換為字符串
<script> array=new Array() array[0]="dark" array[1]="apple" array[2]="nebula" array[3]="water" str1=array.join() str2=array.join(" ") document.write(str1+"<br>") document.write(str2) </script>
12.對數組排序
<script> array=new Array() array[0]="dark" array[1]="apple" array[2]="nebula" array[3]="water" str1=array.sort() document.write(str1+"<br>") </script>
第三章 創(chuàng)建表達式
1.使用算術運算符
<script> var1=12 var2=10 varadd=var1+var2 varsub=var1-var2 varmult=var1*var2 vardiv=var1/var2 varmod=var1%var2 document.write("數據1是:"+var1+"<br>") document.write("數據2是:"+var2+"<br>") document.write("數據相加是:"+varadd+"<br>") document.write("數據相減是:"+varsub+"<br>") document.write("數據相乘是:"+varmult+"<br>") document.write("數據相除是:"+vardiv+"<br>") document.write("數據相除取余數是:"+varmod+"<br>") </script>
2.遞增變量和遞減變量
<script> days=1 document.write("輸出變量"+days+"<br>") days++ document.write("遞增后變量變?yōu)椋?+days) </script>
3.創(chuàng)建比較表達式
<script> daysofmonth=28 if(daysofmonth==28) month="february" document.write("days of month:"+daysofmonth+"<br>") document.write("month:"+month) </script>
4.創(chuàng)建邏輯表達式
<script> dayofmonth=28 if(dayofmonth==28 || dayofmonth==29) month="february" document.write("days of month:"+dayofmonth+"<br>") document.write("month:"+month) </script>
5.使用條件運算符
<script language="javascript"> stomach="hungry"; time="5:00"; (stomach=="hungry"&&time=="5:00") ? eat = "dinner":eat="a snack"; document.write("輸出結果"+eat); </script>
6.識別數字
<script> var1=24; (isNaN(var1))?document.write("變量var1"+var1+"不是數字"):Document.write("變量var1"+var1+"是數字") </script>
第四章 控制程序流程
1.使用IF –Else語句
<script> month="december" date=25 if(month=="december" && date==25) document.write("今天是圣誕節(jié),商店關門") else document.write("歡迎,您來商店購物") </script>
2.使用for 循環(huán)
<script> for (count=1;count<=10;count++) document.write("輸出第"+count+"句"+"<br>") </script>
3.使用while循環(huán)
<script> count=1 while(count<=15){ document.write("輸出第"+count+"句" +"<br>") count++} </script>
4.中斷循環(huán)
<script> count=1 while(count<=15){ count++ if(count==8) break; document.write("輸出第"+count+"句"+"<br>")} </script>
5.繼續(xù)循環(huán)
<script> count=1 while(count<=15){ count++ if(count==8) continue; document.write("輸出第"+count+"句"+"<br>")} </script>
6.使用javascript定時器
<script> function rabbit() {document.write("輸出語句") } </script> <body onload=window.setTimeout(rabbit(),5000)>
7.設置定期間隔
<script> window.setInterval("document.form1.text2.value=document.form1.text1.value",3000) </script> <form name=form1> <input type=text name=text1><br> <input type=text name=text2><br> </form>
8.清除超時和間隔
<script> stop=window.setInterval("document.form1.text2.value=document.form1.text1.value",300) </script> <form name=form1> <input type=text name=text1><br> <input type=text name=text2><br> <input type=button name=button1 value=" 清除超時和間隔" onclick=clearInterval(stop)> </form>
第五章 使用函數
1.聲明函數
<script> function quote() { document.write("輸出語句") } </script>
2.調用函數
<script> function quote() { document.write("輸出語句") } quote() </script>
3.了解全局變量和局部變量
任何不用 var關鍵字聲明的變量都是全局變量,任何在函數外聲明的變量都是全局變量
4.將參數傳送給函數
<script> function f(item) {document.write("輸出參數"+item+"<br>") } f("fgdfgd") f("參數二") </script>
5.從函數返回值
<script> function average(var1,var2,var3) {ave=(var1+var2+var3)/3; document.write("輸出結果"); return ave; } document.write(average(34,56,78)) </script>
6.通過HTML鏈接調用函數
<script> function quote(){ document.write(" 輸出字符串") } </script> <a href=javascript:quote()>通過HTML鏈接調用函數</a> <a href=javascript:Document.write("輸出字符")> 通過HTML鏈接調用函數,直接寫javascript語句</a>
第六章 處理事件
1.檢查鼠標單擊
<form name=form1> <input type=button name=button1 value=hello onclick=document.form1.button1.value='there'> </form>
2.檢測雙擊
<form name=form1> <input type=button name=button1 value=hello onclick=document.form1.button1.value='你單擊了按鈕' ondblclick=document.form1.button1.value='你雙擊了該按鈕'> </form>
3.創(chuàng)建懸停按鈕
<img src=go.gif onmouseover=document.images[0].src='go2.gif' onmouseout= document.images[0].src='go.gif'>
4.檢測按鍵
<form name=form1> <input type=text name=text1 value=hello onkeypress="if(window.event.keyCode=='100') document.form1.text1.value='你按了d鍵'"> </form>
5.設置焦點
<form name=form1> <input type=text name=text1 value=hello onfous=document.form1.text1.value='該文本框獲得焦點' onblur=document.form1.text1.value='該文本框失去焦點'> </form>
6.檢測下拉菜單選擇
<form name=form1> <select name=select1 size=4 onChange=document.form1.text1.value=document.form1.select1.value> <option value="北京">北京</option> <option value="上海">上海</option> <option value="武漢">武漢</option> <option value="天津">天津</option> <option value="大連">大連</option> </select> <input tppe=text name=text1 value=hello> </form>
7.創(chuàng)建網頁加載和卸載信息
<body onload=document.form1.text1.value='頁面加載完畢' onunload=alert('再見,歡迎再來')> <form name=form1> <input type=text name=text1 value="頁面正在加載 ……"> </form>
第七章 使用對象
1.理解對象/屬性和方法
<body bgcolor="green"> <script> document.write("頁面背景顏色是:"+document.bgColor) document.write("頁面前景顏色是:"+document.fgColor) </script>
2.使用網頁元素對象
<script> </script> <form name=form1> <textarea name=ta1>dfgfdgfdhfdhdfdfgdf</textarea> <input type=button value="選擇文本" onclick=document.form1.ta1.select()> <input type=button value="顯示文本" onclick=document.write(document.form1.ta1.value)> </form>
3.使用子對象
<form name=form1> <input type=text name=text1 value=hello> </form> <script> document.form1.text1.value="gdfgfd" </script>
<form name=form1> <input type=radio name=radio1>男 <input type=radio name=radio2>女 </script> <script> document.form1.radio1.checked=true </script>
4.使用預定義對象
<script> str1="dgdfgdfgdfhf固定法固定法功夫攻打法" document.write(str1+"<br>") str2=str1.substr(5) document.write(str2+"<br>") document.write("輸出圓的面積:"+Math.PI*Math.pow(5.0,2)) </script>
5.創(chuàng)建新對象
<script> today=new Date() document.write("今天是"+(today.getMonth()+1)+"月"+today.getDate()+"日"+"<br>") document.write("現在是:"+today.toLocaleString()) </script>
6.引用當前對象
<form name=form1> <input type=text name=text1 value="dgdgdfgfd" onclick=this.select()> </script>
7.查看對象屬性
<script> for(prop in window) {document.write("window."+prop+"="+window[prop]+"<br>");} for(prop2 in location) {document.write("location."+prop2+"="+location[prop]+"<br>");} </script>
8.使用Array對象
<script> array=new Array(10) array[0]="bark" array[1]="apple" array[2]="nebula" array[3]="cookie" array[4]="technology" document.write("數組元素個數是"+array.Length+"<br>") document.write("用 join將數組合并"+array.join(" ")+"<br>") document.write(" 數組排序"+array.sort()) </script>
9.使用 image 對象
<img src=**.gif alt="圖片提示…." border=10> <script> document.write("圖片提示是:"+document.images[0].alt+"<br>") document.write("圖片邊框大小是:"+document.images[0].broder) </script>
10.預加載圖像
<script> freddy=new Image() freddy.src=freddy.gif </script> <body onload=document.images[0].src=freddy.src> ,<img src="blank.gif"> </body>
11.改變圖像
<img src=freddy.gif><br> <form name=form1> <input type=button name=button1 value="改變圖像" onclickd=document.images[0].src=dudjp.gif> </form>
12.使用link和anchor對象
<a name=anchor1>錨點1<br> <a href=http://www.microsoft.com>Microsoft</a><br> <a href=http://www.sohu.com>sohu</a><br> <a href=http://www.sina.com.cn>sina</a><br> <script> document.write("本頁面共有"+document.links.length+"鏈接"+"<br>") document.write("本頁面共有"+document.anchors.length+"錨點"+"<br>") document.write("第一個鏈接協議是"+document.links[0].protocol+"<br>") document.write("第一個鏈接路徑是"+document.links[0].pathnamel+"<br>") document.write("第一個鏈接href是"+document.links[0].hrefl+"<br>") </script>
13.改變鏈接
<a href =http://www.microsoft.com>link</a> <form name=form1> <input type=button name=button1 value="改變鏈接" onclick=document.links[0].> </form>
14.使用history對象
<form name=form1> <input type=button name=button1 value="向后返回2頁" onclick=window.history.go(-2)> </form>
第八章 使用窗口
1.在瀏覽器的狀態(tài)欄上顯示文本
<body onload=window.status="歡迎光臨我的站點"> <a href=http://www.sohu.com>sohu</a> </body>
2.改變背景色
<script> document.bgColor="orange" </script>
3.列舉背景顏色
<body bgColor =green> <script> document.write("當前背景色是:"+document.bgColor) </script> </body>
4.改變文本和鏈接顏色
<script> document.bgColor="orange" document.fgColor="blue" document.linkColor="red" </script> <h2>看看這段文本顏色</h2> <a href=http://www.sohu.com>sohu</a> </body>
5.改變文檔標題
<script> name="Mouse" document.title="welcome to "+name+"'s House" document.write(document.title) </script>
6.顯示修改日期
<script> document.write("本頁面最后修改時間是"+document.lastModified) </script>
7.查看當前文檔的URL
<script> document.write("本頁面的URL:"+document.URL) </script>
8.查看引用頁
<script> document.write("本頁面的引用頁是"+document.referrer) </script>
9.打開新的瀏覽器窗口
<script> window.open("*.htm","title","width=200,height=400,resizable=yes") </script>
10.關閉遠程窗口
close.html: <script> document.write("正文") </script> <form name=form1> <input type=button name=button1value="關閉" onclick=window.close()> </form>
open.html <script> window.open("close.html","romote","width=200,height=400,resizable=yes") </script>
11.打印窗口
<script> document.write("正文") </script> <form name=form1> <input type=button value=打印 onclick=window.print()> </form>
12.移動窗口
<form name=form1> 水平方向<input type=text name=x value=20> 垂直方向<input type=text name=y value=50> <input type=button value="移動窗口到…"onclick=window.moveTo(document.form1.x.value,document.form1.y.value)> </form>
<form name=form1> 水平方向<input type=text name=x value=20> 垂直方向<input type=text name=y value=50> <input type=button value="移動窗口"onclick=window.moveBy(document.form1.x.value,document.form1.y.value)> </form>
13.改變窗口大小
<form name=form1> 水平方向<input type=text name=x value=200> 垂直方向<input type=text name=y value=500> <input type=button value="改變窗口大小到….."onclick=window.resizeTo(document.form1.x.value,document.form1.y.value)> </form>
<form name=form1> 水平方向<input type=text name=x value=200> 垂直方向<input type=text name=y value=500> <input type=button value="改變窗口大小"onclick=window.resizeBy(document.form1.x.value,document.form1.y.value)> </form>
14.用警告對話框通知用戶
<script> window.alert("welcome") </script>
15.用提示對話框接受輸入
<script> name=window.prompt("輸入姓名","姓名") document.write(" 歡迎您:"+name+"來到這里") </script>
16.用確認對話框使用戶做出決定
<script> like=window.confirm("你覺得好嗎?") if(like==true) document.write("謝謝你的夸獎") else document.write("希望得到你的夸獎") </script>
第九章 使用字符串
1.使用字符串對象
<script> mystring="gdgdfgfddddaaaaaaaaaaaabbbbbbbbbbbbbbbbbvbhg.<br>" document.write(mystring) document.write(mystring.bold()) document.write(mystring.toUpperCase()) </script>
2.使用子字符串
<script> str1="fdsf 1111 gfdgfd dfdsf cccc dddd.<br>" document.write(str1) document.write(str1.substring(0,13)+"<br>") document.write(str1.substr (20,11)+"<br>") </script>
3.連接字符串
<script> str1="may you find" str2="peace,happiness and prosperity.<br>" document.write(str1+"<br>") document.write(str2) document.write(str1.concat(str2)) document.write(str1+=str2) </script>
4.格式化字符串變量
<script> str1="peace,happiness and prosperity.<br>" document.write(str1) document.write(str1.big()) document.write(str1.small()) document.write(str1.bold()) document.write(str1.italics()) document.write(str1.strike()) document.write(str1.fontsize(6)) document.write(str1.fontcolor(green)) </script>
5.創(chuàng)建錨和鏈接
<script> str1="this is the bigginning of the page.<br>" str2="….<br>" str3="this is the end of the page .<br>" str4="link to the start<br>" str5="link to the end<br>" document.write(str1.anchor("start")) for(i=0;i<10;i++) document.write(str2); document.write(str3.anchor("end")) document.write(str4.link("#start")) document.write(str5.link("#end")) </script>
6.確定字符串長度
<script> str1="this is the bigginning of the page." document.write(str1+"<br>") document.write( "字符串的長度是:"+str1.length) document.write("字符串全部大寫是;"+str1.toUpperCase()) document.write("字符串全部小寫是;"+str1.toLowerCase()) </script>
7.在字符串內搜索
<script> str1="this is the end of the line.<br>" document.write(str1) document.write("字符end在字符串的位置是"+str1.search("end")) document.write("字符dog在字符串的位置是"+str1.search("dog")) </script>
8.定位字符串中的字符
<script> str1="spring is a time for flowers and trees and baby bunnles<br>" document.write(str1) document.write("the index for the second word ‘and' is"+str1.indexOf("and",30)) documednt.write("the last index of the word ‘and' is "+str1.lastIndexOf("and")) </script>
9.替換字符串中的文本
<script> str1="spring is a time for flowers and trees and baby bunnles<br>" document.write(str1) document .write(str1.replace("and",",")) </script>
10.字符串分離
<script> str1="spring is a time for flowers and trees and baby bunnles<br>" document.write(str1) str1array=str1.split(" ") document.write(str1array[0]+"<br>") document.write(str1array[1]+"<br>") document.write(str1array[2]+"<br>") document.write(str1array[3]+"<br>") </script>
第十章 使用日期和時間
1.使用Date對象
<script> cdate=new Date("august 2,1989 12:30:00") document.write(cdate) </script>
2.顯示當地時間和日期
<script> cdate=new Date() document.write("當前時間是:"+cdate.toGMTString()+"<br>") document.write("日期和時間是:"+cdate.toLocaleString()) </script>
3.獲得時間和日期值
<script> cdate=new Date() document.write("顯示當前的星期"+cdate.getDay()+"<br>") document.write("顯示當前的月份"+cdate.getMonth()+"<br>") document.write("顯示當前的日期"+cdate.getDay()+"<br>") document.write("顯示當前的年份"+cdate.getYear()+"<br>") document.write("顯示當前的小時"+cdate.getHours()+"<br>") document.write("顯示當前的分鐘"+cdate.getMinutes()+"<br>") document.write("顯示當前的秒"+cdate.getSeconds()+"<br>") </script>
4.設置時間和日期值
<script language=javascript> cdate=new Date("December 25,1984") document.write("顯示日期"+cdate+"<br>") document.write("設置月份"+cdate.setMonth(10)+"<br>") document.write("設置日期"+cdate.setDate(23)+"<br>") document.write("設置年份"+cdate.setYear(2000)+"<br>") document.write("設置小時"+cdate.setHours(13)+"<br>"); document.write("設置分鐘"+cdate.setMinutes(47)+"<br>"); document.write("設置秒"+cdate.setSeconds(23)+"<br>"); document.write("顯示設置后的日期和時間"+cdate); </script>
第十一章 使用Math對象
1. 使用Math對象
<script language=javascript> </script> <form name=form1> 圓的半徑:<input type=text name=rad><br> 圓的面積:<input type=text name=area><br> <input type=button name=button1 value=計算圓的面積 onclick=document.form1.area.value=document.form1.rad.value*document. form1.rad.value*Math.PI> </form>
2.生成隨機數
<script> array1=new Array( "這是第1句", "這是第2句", "這是第3句", "這是第4句", "這是第5句", "這是第6句") RandomNo=Math.floor(array1.length*Math.random()) document.write("隨機輸出某一句"+"<br>"+array1[RandomNo]) </script>
3.使用平方根
<form name=form1> value:<input type=text name=va1><br> 平方根<input type=text name=sqrt><br> <input type=button name=button1 value=計算平方根 onclick="document.form1.sqrt.value=Math.sqrt(document.form1.va1.value)"> </form>
4.數字的舍入
<form name=form1> 輸入<input type=text name=val><br> 舍入的結果<input type=text name=round><br> <input type=button name=button1 value=計算結果 onclick=document.form1.round.value=Math.round(document.form1.val.value)> </form>
5.乘方運算
<form name=form1> 底數<input type=text name=val><br> 指數<input type=text name=power><br> 冪<input type=text name=result><br> <input type=button name=button1 value=計算結果 onclick="document.form1.result.value=Math.pow (document.form1.val.value,document.form1.power.value)"> </form>
6.發(fā)現最小值和最大值
<form name=form1> 數字1<input type=text name=val1><br> 數字2<input type=text name=val2><br> 最小值<input type=text name=min><br> 最大值<input type=text name=max><br> 數字1<input type=button value=計算 onclick="document.form1.min.value=Math.min (document.form1.val1.value,document.form1.val2.value);document.form1. max.value= Math.max(document.form1.val1.value,document.form1.val2.value)"> </form>
第十二章 使用表單
1.使用文本框
<form name=form1> <input type=text value="information ,please"name=text1> </form> <script> document.write("表單text1類型是: "+document.form1.text1.type+"<br>") document.write("表單text1名稱是: "+document.form1.text1.name+"<br>") document.write("表單text1值是: "+document.form1.text1.value+"<br>") document.write("表單text1大小是: "+document.form1.text1.size+"<br>") </script>
<form name=form1> <input type=text name=text1 value=click here onfocus=document.form1.text1.select()> </form>
2.使用密碼框
<form name=form1> <input type=password name=pw1 value=daylight> </form> <script> document.write("表單pw1的類型:"+document.form1.pw1.type+"<br>") document.write("表單pw1的名稱:"+document.form1.pw1.name+"<br>") document.write("表單pw1的值:"+document.form1.pw1.value+"<br>") document.write("表單pw1的大小:"+document.form1.pw1.size+"<br>") </script>
3.使用隱藏字段
<form name=form1> <input type=hidden name=hid1 value=piece of eight> </form> <script> document.write("表單hid1的類型:"+document.form1.hid1.type+"<br>") document.write("表單hid1的名稱:"+document.form1.hid1.name+"<br>") document.write("表單hid1的值:"+document.form1.hid1.value+"<br>") </script>
4.使用文本區(qū)域框
<form name=form1> <textarea name=ta1>how many grains of sand are there in the sahara desert?</textarea> </form> <script> document.write("表單ta1的類型:"+document.form1.ta1.type+"<br>") document.write("表單ta1的名稱:"+document.form1.ta1.name+"<br>") document.write("表單ta1的值:"+document.form1.ta1.value+"<br>") document.write("表單ta1的橫向寬度:"+document.form1.ta1.cols+"<br>") document.write("表單ta1的縱向寬度:"+document.form1.rows.value+"<br>") </script>
6.使用重置按鈕
<form name=form1> <input type=reset name=reset1 value="rest form"> </form> <script> document.write("表單reset1的類型:"+document.form1.reset1.type+"<br>") document.write("表單reset1的名稱:"+document.form1.reset1.name+"<br>") document.write("表單reset1的值:"+document.form1.reset1.value+"<br>") </script>
7.使用提交按鈕
<form name=form1> <input type=submit name=submit1 value="submit form"> </form> <script> document.write("表單submit1的類型:"+document.form1.submit1.type+"<br>") document.write("表單submit1的名稱:"+document.form1.submit1.name+"<br>") document.write("表單submit1的值:"+document.form1.submit1.value+"<br>") </script>
8.使用復選按鈕
<form name=form1> <input type=checkbox name=cb1 >computer savvy? </form> <script> document.write("表單cb1的類型:"+document.form1.cb1.type+"<br>") document.write("表單cb1是否被選擇?:"+document.form1.cb1.checked+"<br>") document.write("表單cb1的名稱:"+document.form1.cb1.name+"<br>") </script>
9.使用單選按鈕
<form name=form1> <input type=radio name=radio1>male <input type=radio name=radio1>female </form> <script> document.write("第一個按鈕被選擇"+document.form1.radio1[0].checked+"<br>") document.write("第二個按鈕被選擇"+document.form1.radio1[1].checked+"<br>") document.write("按鈕的名稱"+ document.form1.radio1[0].name+"<br>") document.write("按鈕的個數"+document.form1.radio1.length) </script>
10.使用選擇列表
<form name=form1> <select name=select1 size=4> <option name=option1 value=lon>london,England</option> <option name=option2 value=dub>Dublin,Ireland</option> </select> </form> <script> document.write("這個選擇列表的名稱"+document.form1.select1.name+"<br>") document.write("這個選擇列表的長度"+document.form1.select1.length+"<br>") document.write("這個選擇列表當前被選擇的索引號"+document.form1.select1.selectedIndex+"<br>") document.write("這個選擇列表的尺寸"+document.form1.select1.size+"<br>") </script>
11.驗證表單的有效性
<script> function validate(){ if(document.form1.text1.value!='1'||'2'||'3'||'4'){ alert("請輸入1~4的整數") } } </script> <form name=form1> 請輸入1~4的整數: <input type=text name=text1 size=4 onchange=validate()> </form>
12.控制表單焦點
<form name=form1> <input type=text name=text1 value=where is you focus?><br> <input type=text name=text2 value=is there?><br> <input type=text name=text3 value=or maybe here?><br> <input type=button name=button1 value="text box #1" onclick=document.form1.text1.focus()><br> <input type=button name=button2 value="text box #2" onclick=document.form1.text2.focus()><br> <input type=button name=button3 value="text box #3" onclick=document.form1.text3.focus()><br> </form>
第十三章 使用分欄
第十四章 使用navigator
1.使用navigator對象
<script> document.write("navigator對象的屬性"+"<br>") document.write("appcodename:"+navigator.appCodeName+"<br>") document.write("appname::"+navigator.appName+"<br>") document.write("appversion:"+navigator.appVersion+"<br>") document.write("platform:"+navigator.platform+"<br>") document.write("userAgent:"+navigator.userAgent+"<br>") </script> <script> document.write("navigator對象的方法"+"<br>") document.write("javaEnabled():"+navigator.javaEnabled()) </script>
2.檢查用戶的瀏覽器
<script> if(navigator.appName.indexOf("Microsoft")!=-1){ document.write("用戶瀏覽器是微軟的IE瀏覽器"+"<br>")} else if(navigator.appName.indexOf("Netscape")!=-1){ document.write("用戶瀏覽器是netscape的netscape瀏覽器"+"<br>")} if(navigator.appVersion.indexOf("4.0")!=-1){ document.write("you are using a version 4.0compatible browser") } else{ document.write("this browser is not 4.0 compliant")} </script>
3.檢測用戶的操作系統(tǒng)
<script> if (navigator.platform.indexOf("win32")!=-1){ document.write("you are using a computer running windows 95 or highter")} else{ document.write("this computer is not running windows 95 or higher")} </script>
4.使用location對象
<script> document.write("location對象的屬性"+"<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>
重新加載網頁 <form name=form1> <input type=button name=button1 value=重新加載本頁 onclick=location.reload> </form>
5.使用cookie
<script> finction makecookie(){ if(!document.cookie){ name=prompt("請輸入你的姓名"); document.cookie="name="+name+";";} } </script>
<body onload=makecookie()> <script> function makecookie(){ if(!document.cookie){ name=prompt("請輸入你的姓名") document.cookie="name="+name+";"; namestart=document.cookie.indexOf("="); nameend=document.cookieindexOf(";"); document.writeln("your name is:"+document.cookie.substring(namestart+1,nameend)+",br>") } } </script>
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