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源代码：
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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>素材8网教程(study.sucai8.cn)</title> </head> <body> <script> var carname1="Volvo XC60"; var carname2='Volvo XC60'; var answer1='It\'s alright'; var answer2="He is called \"Johnny\""; var answer3='He is called "Johnny"'; document.write(carname1 + "<br>") document.write(carname2 + "<br>") document.write(answer1 + "<br>") document.write(answer2 + "<br>") document.write(answer3 + "<br>") </script> </body> </html>
运行结果