1.在改变单个元素样式时，注意style对象的语法和css中使用的语法几乎是一一对应的。不过包含连字符的属性则被替换为一种“camel castring”的形式，例如：font-size现在成了fontSize，而margin-top变成了marginTop；
2.在使用“float”时，因为“float”是javascript的一个保留字，所以就不能使用style.float，而改成了style.cssFloat(IE使用的是style.styleFloat)；
3. 获得元素的计算样式:
在W3C DOM下可以：
复制代码 代码如下:
var heading = document.getElementById("heading");
var computedStyle = document.defaultView.getComputedStyle(heading,null);
var computedFontFamily = computedStyle.fontFamily;//sans-serif
IE不支持使用DOM标准方法，可以：
复制代码 代码如下:
var heading = document.getElementById("heading");
var computedFontFamily = heading.currentStyle.fontFamily;//sans-serif
综合上述这些方法，可以创建一个跨浏览器函数来实现
复制代码 代码如下:
function retrieveComputedStyle(element,styleProperty){
var computedStyle = null;
if(typeof element.currentStyle != "undefined"){
computedStyle = element.currentStyle;
}else{
computedStyle = document.defaultView.getComputedStyle(element,null);
}
return computedStyle[styleProperty];
}
对照表
CSS Properties To JavaScript Reference Conversion CSS Property JavaScript Reference
background background
background-attachment backgroundAttachment
background-color backgroundColor
background-image backgroundImage
background-position backgroundPosition
background-repeat backgroundRepeat
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
clip clip
color color
cursor cursor
display display
filter filter
font font
font-family fontFamily
font-size fontSize
font-variant fontVariant
font-weight fontWeight
height height
left left
letter-spacing letterSpacing
line-height lineHeight
list-style listStyle
list-style-image listStyleImage
list-style-position listStylePosition
list-style-type listStyleType
margin margin
margin-bottom marginBottom
margin-left marginLeft
margin-right marginRight
margin-top marginTop
overflow overflow
padding padding
padding-bottom paddingBottom
padding-left paddingLeft
padding-right paddingRight
padding-top paddingTop
page-break-after pageBreakAfter
page-break-before pageBreakBefore
position position
float styleFloat
text-align textAlign
text-decoration textDecoration
text-decoration: blink textDecorationBlink
text-decoration: line-through textDecorationLineThrough
text-decoration: none textDecorationNone
text-decoration: overline textDecorationOverline
text-decoration: underline textDecorationUnderline
text-indent textIndent
text-transform textTransform
top top
vertical-align verticalAlign
visibility visibility
width width
z-index zIndex
Usage Internet Explorer
document.all.div_id.style.JS_property_reference = "new_CSS_property_value";
Older Netscape's (4.7 and earlier)
document.div_id.JS_property_reference = "new_CSS_property_value";
Netscape 6.0+ and Opera (and other Mozilla)
document.getElementById(div_id).style.JS_property_reference = "new_CSS_property_value";
Note the use of parentheses instead of square brackets in newer Mozilla's "getElementById()" reference.