HBCMS更多的中文手册参考:

JustifyCenter Command

DHTML文档教程

Centers the format block in which the current selection is located.

Scripting Information

Command JustifyCenter
User interface None. Set bUserInterface to false or omit. 
execCommand vValue Optional. Set to null or omit.
Applies toexeccommandquerycommandenabledquerycommandindetermquerycommandstatequerycommandsupportedqueryCommandValue.

是否符合公共标准

There is no public standard that applies to this command.

Minimum Availability

Internet Explorer 4.0 and later.