循环的三种写法: <!doctype html> <title>js循环 by 软件开发网</title> <meta charset="utf-8"/> <meta name="keywords" content="js循环 by 软件开发网" /> <meta name="description" content="js循环 by 软件开发网" /> </head> <body> //while循环 [removed] i = 1; while (i <= 6) { [removed]("