JS记录

1、获取子元素的个数方法
document.getElementById("main").children.length
2、根据索引获取子元素的信息
var fatherDiv = document.getElementById("father").children;
2.1 获取id: fatherDiv[0].id
2.2 获取style: fatherDiv[0].style
2.3 获取height: fatherDiv[0].style.height
2.4 获取背景色: fatherDiv[0].style.backgroundColor
3、window下对象
screen:
navigator:
location:
history:
frames[]:
document: