1.js修改单个元素的css属性
document.getElementByIdx('obj').className=”…”，
document.getElementByIdx('obj').style.backgroundColor=”#003366″ ，
2.js修改整个页面的css属性
3.js和css的style属性对照表
盒子标签和属性对照
CSS语法 (不区分大小写) java script语法 (区分大小写)
border border
border-bottom borderBottom
border-bottom-color borderBottomColor
border-bottom-style borderBottomStyle
border-bottom-width borderBottomWidth
border-color borderColor
border-left borderLeft
border-left-color borderLeftColor
border-left-style borderLeftStyle
border-left-width borderLeftWidth
border-right borderRight
border-right-color borderRightColor
border-right-style borderRightStyle
border-right-width borderRightWidth
border-style borderStyle
border-top borderTop
border-top-color borderTopColor
border-top-style borderTopStyle
border-top-width borderTopWidth
border-width borderWidth
clear clear
float floatStyle
margin margin
margin-bottom marginBottom
margin-left marginLeft
margin-right marginRight
margin-top marginTop
padding padding
padding-bottom paddingBottom
padding-left paddingLeft
padding-right paddingRight
padding-top paddingTop
颜色和背景标签和属性对照
CSS语法 (不区分大小写) java script语法 (区分大小写)
background background
background-attachment backgroundAttachment
background-color backgroundColor
background-image backgroundImage
background-position backgroundPosition
background-repeat backgroundRepeat
color color