​x
 
<!DOCTYPE html>
<html>
​
<style>
div {
  background-image: url('/i/pic/flower.gif');
  background-repeat: no-repeat;
  width: 400px;
  height: 400px;
  border: 1px solid #000000;
}
</style>
​
<body>
​
<h1>HTML Style 对象</h1>
​
<h2>backgroundPosition 属性</h2>
​
<button type="button" onclick="myFunction()">定位背景图像</button>
<br>
<div id="myDiv">
</div>
​
<script>
function myFunction() {
  document.getElementById("myDiv").style.backgroundPosition = "200px 40px";  
}
</script>
​
</body>
</html>
​