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源代码：
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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>安科教程(www.ancii.com)</title> </head> <body> <p id="demo">单击按钮后显示设置成90分钟前的日期</p> <button onclick="myFunction()">点我</button> <script> function myFunction(){ var d = new Date(); d.setUTCMinutes(d.getUTCMinutes()-90); var x = document.getElementById("demo"); x.innerHTML=d; } </script> </body> </html>
运行结果
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