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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>搜索字符串 "w3cSchool", 并显示匹配的起始位置：</p> <button onclick="myFunction()">点我</button> <p id="demo"></p> <script> function myFunction() { var str = "Visit W3cSchool!"; var n = str.search(/w3cSchool/i); document.getElementById("demo").innerHTML = n; } </script> </body> </html>
运行结果
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