​x
 
<!DOCTYPE html>
<html>
<body style="background:#f3f3f3 url('/i/pic/tree.png') no-repeat right top;">
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<h1>HTML Style 对象</h1>
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<h2>background 属性</h2>
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<p>背景属性是：</p>
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<p id="demo"></p>
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<script>
let back = document.body.style.background;
document.getElementById("demo").innerHTML = back
</script>
​
</body>
</html>
​