how to jump to the next open directory in vim nerdtree plugin
For example 
My file tree looks like this 

    +/root/  
        -/close/  
        +/open/  
            aa.html  
            bb.xml  

If the cursor is in root line ,how to jump to 'open' directory as quick as possible,
Each time I need to use the 'j','k' key,it's not convenient enough!
Thanks for help
how to jump to the next open directory in vim nerdtree plugin
===

For example 
My file tree looks like this 

    +/root/  
        -/close/  
        +/open/  
            aa.html  
            bb.xml  

If the cursor is in root line ,how to jump to 'open' directory as quick as possible,
Each time I need to use the 'j','k' key,it's not convenient enough!
Thanks for help