javascript中使用css需要注意的地方小结
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：
代码如下:
var heading = document.getElementById("heading");
var computedStyle = document.defaultView.getComputedStyle(heading,null);
var computedFontFamily = computedStyle.fontFamily;//sans-serif
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
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.