编辑下面的代码:【加编码】
<html> <body> <script> var str="The rain in Spain stays mainly in the plain"; var patt1=/ain/g; while (patt1.test(str)==true) { document.write("'ain' found. Index now at: "+patt1.lastIndex); document.write("<br>"); } </script> </body> </html>
结果: 【此窗口】 帮助?
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