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<!DOCTYPE html> <html> <body> <p>进行全局搜索，并在字符串中测试“Hello”和“BEGTUT”：</p> <button onclick="myFunction()">试一试</button> <p id="demo"></p> <script> function myFunction() { var str = "Hello world!"; // look for "Hello" var patt = /Hello/g; var result = patt.test(str); // look for "BEGTUT" patt2 = /BEGTUT/g; result2 = patt2.test(str); document.getElementById("demo").innerHTML = result + "<br>" + result2; } </script> </body> </html>