JavaScript Math asin 方法 javascript while 循环 JavaScript Math atan 方法 JavaScript Math asin 方法 <html> <head> <title>JavaScript Math asin() Method</title> </head> <body> <script type = "text/javascript"> var value = Math.asin(-1); document.write("First Test Value : " + value ); var value = Math.asin(null); document.write("<br />Second Test Value : " + value ); var value = Math.asin(30); document.write("<br />Third Test Value : " + value ); var value = Math.asin("string"); document.write("<br />Fourth Test Value : " + value ); </script> </body> </html> javascript while 循环 JavaScript Math atan 方法