document.all[]详解

1、理解document.all[]

从IE4开始IE的object model才增加了document.all[],来看看document.all[]的Description:

Array of all HTML tags in the document.Collection of all elements contained by the object.

也就是说document.all[]是文档中所有标签组成的一个数组变量，包括了文档对象中所有元素（见例1）。

IE’s documen t.all collection exposes all document elements.This array provides access to every element in the document.

document.all[]这个数组可以访问文档中所有元素。

例1（这个可以让你理解文档中哪些是对象）

Transitional//EN"

"/TR/xhtml1/DTD/xhtml1-transitional.dtd" >

Example Heading

---

This is a paragraph. It is only a

paragraph.

Yet another paragraph.

This final paragraph has

id="special">special emphasis.

---

输出结果：

Example Heading

--------------------------------------------------------------------------------

This is a paragraph. It is only a paragraph.

Yet another paragraph.

This final paragraph has special emphasis.

--------------------------------------------------------------------------------

document.all.length=272

document.all[0]=!

document.all[1]=HTML

document.all[2]=HEAD

document.all[3]=TITLE

document.all[4]=META

document.all[5]=META

document.all[6]=META

document.all[7]=LINK

document.all[8]=LINK

document.all[9]=SCRIPT

document.all[10]=SCRIPT

document.all[11]=BODY

document.all[12]=CENTER

document.all[13]=!

document.all[14]=DIV

document.all[15]=UL

document.all[16]=LI

document.all[17]=A document.all[18]=FONT document.all[19]=A document.all[20]=FONT document.all[21]=LI document.all[22]=A document.all[23]=LI document.all[24]=A document.all[25]=LI document.all[26]=A document.all[27]=LI document.all[28]=A document.all[29]=LI document.all[30]=A document.all[31]=FONT document.all[32]=IMG document.all[33]=LI document.all[34]=A document.all[35]=LI document.all[36]=A document.all[37]=LI document.all[38]=A document.all[39]=LI document.all[40]=A document.all[41]=SCRIPT document.all[42]=LI document.all[43]=A document.all[44]=LI document.all[45]=A document.all[46]=FONT document.all[47]=B document.all[48]=LI document.all[49]=A document.all[50]=FONT document.all[51]=B document.all[52]=DIV document.all[53]=DIV document.all[54]=DIV document.all[55]=IMG document.all[56]=DIV document.all[57]=SCRIPT document.all[58]=SCRIPT document.all[59]=SCRIPT document.all[60]=SCRIPT