1 数组对象

作用是：使用单独的变量名来存储一系列的值。

1.1 新建数组：

var mycars = new Array()

mycars[0] = "Saab"

mycars[1] = "Volvo"

mycars[2] = "BMW"

1.2 For In声明

for (x in mycars)

{

document.write(mycars[x] + "<br />")

}

1.3 合并数组

var arr = new Array(3)

arr[0] = "George"

arr[1] = "John"

arr[2] = "Thomas"

var arr2 = new Array(3)

arr2[0] = "James"

arr2[1] = "Adrew"

arr2[2] = "Martin"

var arr3 = arr.concat(arr2)

document.write(arr3)

输出：George,John,Thomas,James,Adrew,Martin

1.4 生成字符串join

var str = arr.join()

George,John,Thomas

var str = arr.join(".")

George.John.Thomas

1.5 数组排序sort

function sortNumber(a, b)

{

return a<b

}

var arr = new Array(6)

arr[0] = "George"

arr[1] = "John"

arr[2] = "Thomas"

arr[3] = "James"

arr[4] = "Adrew"

arr[5] = "Martin"

document.write(arr + "<br />")

document.write(arr.sort(sortNumber))

arr.sort()默认升序排序

2 消息框

2.1 警示框Alert

alert("再次向您问好！在这里，我们向您演示" + '\n' + "如何向警告框添加折行。")

2.2 确认框comfirm

confirm("Press a button!");

2.3 提示框prompt

prompt("请输入您的名字","Bill Gates")

3 cookie

3.1 创建和存储 cookie

function setCookie(c_name,value,expiredays){var exdate=new Date()exdate.setDate(exdate.getDate()+expiredays)document.cookie=c_name+ "=" +escape(value)+((expiredays==null) ? "" : ";expires="+exdate.toGMTString())}

3.2 获取cookie

function getCookie(c_name){if (document.cookie.length>0)  {  c_start=document.cookie.indexOf(c_name + "=")  if (c_start!=-1)    {     c_start=c_start + c_name.length+1     c_end=document.cookie.indexOf(";",c_start)    if (c_end==-1) c_end=document.cookie.length    return unescape(document.cookie.substring(c_start,c_end))    }   }return ""}