javascript常用函數大全（三）

4.格式化字串變數  <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.建立錨和連結  <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.確定字串長度  <script>  str1="this is the bigginning of the page."  document.write(str1+"<br>")  document.write( "字串的長度是:"+str1.length)  document.write("字串全部大寫是;"+str1.toUpperCase())  document.write("字串全部小寫是;"+str1.toLowerCase())  </script>  7.在字串內搜尋 <script>  str1="this is the end of the line.<br>"  document.write(str1)  document.write("字元end在字串的位置是"+str1.search("end"))  document.write("字元dog在字串的位置是"+str1.search("dog"))  </script>  8.定位字串中的字元  <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("目前時間是:"+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.設定時間和日期值  <script language=javascript>  cdate=new Date("December 25,1984")  document.write("顯示日期"+cdate+"<br>")  document.write("設定月份"+cdate.setMonth(10)+"<br>")  document.write("設定日期"+cdate.setDate(23)+"<br>")  document.write("設定年份"+cdate.setYear(2000)+"<br>")  document.write("設定小時"+cdate.setHours(13)+"<br>");  document.write("設定分鐘"+cdate.setMinutes(47)+"<br>");  document.write("設定秒"+cdate.setSeconds(23)+"<br>");  document.write("顯示設定後的日期和時間"+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.產生隨機數  <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.數位舍入  <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.使用文字框  <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.使用隱藏欄位  <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.使用文本地區框  <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.使用重設按鈕  <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.使用複選按鈕  <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.使用選項按鈕  <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.使用挑選清單  <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("這個挑選清單的名稱"+document.form1.select1.name+"<br>")  document.write("這個挑選清單的長度"+document.form1.select1.length+"<br>")  document.write("這個挑選清單當前被選擇的索引號"+document.form1.select1.selectedIndex+"<br>")  document.write("這個挑選清單的尺寸"+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.控製表單焦點  <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.檢查使用者的瀏覽器  <script>  if(navigator.appName.indexOf("Microsoft")!=-1){  document.write("使用者瀏覽器是微軟的IE瀏覽器"+"<br>")}  else if(navigator.appName.indexOf("Netscape")!=-1){  document.write("使用者瀏覽器是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.檢測使用者的作業系統  <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>  重新載入網頁  <form name=form1>  <input type=button name=button1 value=重新載入本頁 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>