实例代码“Ctrl+/”提示“F11/ESC”全屏 返回 格式化 恢复 运行
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<!DOCTYPE html>
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<html>
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<body>
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​
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<p id="demo">Click the button to display the square root of different numbers.</p>
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​
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<button onclick="myFunction()">Try it</button>
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​
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<script>
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function myFunction()
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{
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var a=Math.tan(90);
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var b=Math.tan(-90);
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var c=Math.tan(45);
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var d=Math.tan(60);
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​
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var x=document.getElementById("demo")
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x.innerHTML=a + "<br>" + b + "<br>" + c + "<br>" + d;
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}
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</script>
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​
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</body>
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</html>