文章目錄
javascript 全集第一章javascript簡介
1.在地址欄輸入javascript語句
Javascriptocument.write("顯示文字")
2.將javascript嵌入 HTML文檔
<script language=javascript>
document.bgColor="blue"
</script>
第二章 使用變數和數組
1.聲明變數
<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("顯示十進位數:"+ decimalNum+"<br>")
document.write("顯示十六進位數:"+ hexadecimalNum +"<br>")
document.write("顯示八位元:"+ 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("顯示字串1:"+str1+"<br>")
document.write("顯示字串2:"+str2+"<br>")
</script>
6.確定變數類型
<script>
var answer1,answer2,answer3,answer4
answer1=9
answer2=2.5
answer3="milky may"
answer4=true
document.write("變數1的類型是:"+typeof answer1 +"<br>")
document.write("變數2的類型是:"+typeof answer2 +"<br>")
document.write("變數3的類型是:"+typeof answer3 +"<br>")
document.write("變數4的類型是:"+typeof answer4 +"<br>")
</script>
7.將字串轉換成數字
<script>
var str1="31 days in january"
var int1=parseInt(str1)
document.write("str1的資料類型是 :"+typeof str1+"<br>")
document.write("int1的資料類型是 :"+typeof int1+"<br>")
</script>
8.將數字轉換成字串
<script>
var int1=256
var str1=""+int1
document.write("str1的資料類型是 :"+typeof str1+"<br>")
document.write("int1的資料類型是 :"+typeof int1+"<br>")
</script>
9.聲明數組
<script>
array=new Array(5)
array[0]=1
array[1]=3
array[2]=5