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CSS background-position-y 属性
trycss_js_background-position-y
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<!DOCTYPE html> <html> <head> <style> #myDIV { border: 1px solid black; width: 300px; height: 250px; background: url('/demo/images/w3css.gif') no-repeat; } </style> </head> <body> <h1>Change background-position-y with JavaScript</h1> <p>Click the "Try it" button to set the background-position-y property of the DIV element to "center":</p> <button onclick="myFunction()">Try it</button> <div id="myDIV"> <h1>Hello</h1> </div> <script> function myFunction() { document.getElementById("myDIV").style.backgroundPositionY = "center"; } </script> </body> </html>