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题目详情

单选题在HTML页面上包含如下所示的JavaScript代码,要实现打开页面时弹出对话框显示"张三",则下划线处应填写的代码为( ). <html> <head> <script language="javascript"> var studentList = new Array(); studentList['一班'] = ['张三','李四']; alert(_____________);//在此处填写代码 </script> </head> </html>

A. studentList[0][0]

B. studentList[0]['张三']

C. studentList['一班']['张三']

D. studentList['一班'][0]