Javascript and vbscript data sharing _ javascript skills

If Javascript and vbscript data sharing is flawed, please point out, thank you

1. common global variables
There are many methods to reference a global variable in browser. you can directly reference this variable or use window. variable is used to reference global variables because the global variables belong to the window form. However, when a new window is opened, the browser automatically clears the existing variables (that is, each newly opened page is a "innocent web page". Therefore, you cannot reference variables defined previously in the new window. if you want to reference them, you can obtain them in a directed manner, for example, you can obtain the URL by passing URL parameters. However, this is the case later.) for example:
Script
Var global = "this is a global var ."
Script