本代码主要是对AJAX中3D图形进行开发和实践，里面总共包含了7个调用3D图形的AJAX的实例，通过这些事例，用户可以很快的学会该应用-This code is mainly for 3D graphics in AJAX development and practice, which includes a total of seven called AJAX examples of 3D graphics, through these examples, the user can quickl