《事半功倍系列javascript》全部源代码1第一章javascript简介1.在地址栏输入javascript语句Javascript:document.write("显示文字")2.将javascript嵌入HTML文档<scriptlanguage=javascript>document.bgColor="blue"</script>第二章使用变量和数组1.声明变量<scriptlanguage=javascripe>Varanswer1,answer2,answer3,answer4;answer1=9;answer2=2.5answer3="MilkeyMay"answer4=true</script>2.使用整数<scriptlanguage=javascript>vardecimalNum,hexadecimalNum,octalNumdecimalNum=24hexadecimalNum=0x24octalNum=024document.write("显示十进制数："+decimalNum+"<br>")document.write("显示十六进制数："+hexadecimalNum+"<br>")document.write("显示八进制数："+octalNum+"<br>")</script>3.使用浮点数<scriptlanguage=javascript>varnum1,num2,num3,num4num1=1234567890000.0num2=5.14e23num3=0.0000123456num4=6.0254e3-4document.write("浮点数1："+num1+"<br>")document.write("浮点数2："+num2+"<br>")document.write("浮点数3："+num3+"<br>")document.write("浮点数4："+num4+"<br>")</script>4.使用布尔值<scriptlanguage=javascript>varanswer1,answer2answer1=trueanswer2=falsedocument.write("显示布尔1："+answer1+"<br>")document.write("显示布尔2："+answer2+"<br>")</script>5.使用字符串<scriptlanguage=javascript>varstr1,str2str1="fdsgdgdsfdsfchina"str2="武汉市广播电视大学"document.write("显示字符串1："+str1+"<br>")document.write("显示字符串2："+str2+"<br>")</script>6.确定变量类型<script>varanswer1,answer2,answer3,answer4answer1=9answer2=2.5answer3="milkymay"answer4=truedocument.write("变量1的类型是："+typeofanswer1+"<br>")document.write("变量2的类型是："+typeofanswer2+"<br>")document.write("变量3的类型是："+typeofanswer3+"<br>")document.write("变量4的类型是："+typeofanswer4+"<br>")</script>7.将字符串转换成数字<script>varstr1="31daysinjanuary"varint1=parseInt(str1)document.write("str1的数据类型是："+typeofstr1+"<br>")document.write("int1的数据类型是："+typeofint1+"<br>")</script>8.将数字转换成字符串<script>varint1=256varstr1=""+int1document.write("str1的数据类型是："+typeofstr1+"<br>")document.write("int1的数据类型是："+typeofint1+"<br>")</script>9.声明数组<script>array=newArray(5)array[0]=1array[1]=3array[2]=5array[3]=7array[4]=11document.write("数组是："+array[0]+""+array[1]+""+array[2]+""+array[3]+""+array[4])</script>10.确定数组元素的个数<script>array=newArray(5)array[0]=1