html内敛样式background js获取内联样式的方法

javascript 获取内联样式

#box{

width:100px;

height:100px;

background-image:url(1.jpg);

background-size:140% 140%;

background-repeat:no-repeat;

border:20px solid rgba(0,0,0,.3);

background-clip:border-box;

background-position:-20px -20px;

}

//获取内联样式元素

function getStyle( obj , attr )

{

if ( window.getComputedStyle ) {

return getComputedStyle( obj , null )[attr];

}else{

return obj.currentStyle[attr];

}

}

//获取对象

function $(id){

return document.getElementById(id);

}

var box = $('box');

//打印样式

alert(getStyle(box , 'background-position'));