<!DOCTYPE html><html><head> <title></title></head><body> <div class="zxc" style="background-color: red;width: 100px;height: 100px;"></div> <script type="text/javascript"> setInterval(function(){ var len=10; document.querySelector('.zxc').style.marginLeft = len+'px'; len +=10; }, 100) </script></body></html> <!DOCTYPE html><html><head> <title></title></head><body> <div class="zxc" style="background-color: red;width: 100px;height: 100px;"></div> <script type="text/javascript"> var len=10; setInterval(function(){ document.querySelector('.zxc').style.marginLeft = len+'px'; len +=10; }, 100) </script></body></html>
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