<!--DOCTYPE html-->
<html>
<head>
<meta charset="utf-8" />
<style>
*{ text-align:center;}
input{ margin-top:30px; padding:10px 20px;}
#div1{ width:500px; height:300px; background:red; margin:10px auto;}
</style>
</head>
<body>
<input type="button" value="style" id="btn" />
<div id="div1"></div> <script>
//获取非行间css样式
function getStyle(obj,attr){ //获取非行间样式,obj是对象,attr是值
if(obj.currentStyle){ //针对ie获取非行间样式
return obj.currentStyle[attr];
}else{
return getComputedStyle(obj,false)[attr]; //针对非ie
};
};
//为对象写入/获取css样式
function css(obj,attr,value){ //对象,样式,值。传2个参数的时候为获取样式,3个是设置样式
if(arguments.length == 2){ //arguments参数数组,当参数数组长度为2时表示获取css样式
return getStyle(obj,attr); //返回对象的非行间样式用上面的getStyle函数
}else{
if(arguments.length == 3){ //当传三个参数的时候为设置对象的某个值
obj.style[attr] = value;
};
};
};
window.onload = function(){
var oDiv = document.getElementById("div1");
var oBtn = document.getElementById("btn");
oBtn.onclick = function(){
alert(getStyle(oDiv,"height"));
css(oDiv,"background","green");
alert(css(oDiv,"width"));
};
};
</script>
</body>
</html>