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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>本教程(w3big.com)</title> </head> <body> <script> var str="Hello world!"; //查找"Hello" var patt=/Hello/g; var result=patt.test(str); document.write("返回值: " + result); //查找 "W3Cschool" patt=/W3Cschool/g; result=patt.test(str); document.write("<br>返回值: " + result); </script> </body> </html>