Unable to get the Subgrid name using javascript in CRM 2011

Hi All,

I want refresh the subgrid on my CRM entity page. But i am unable to get the Subgrid name and its properties and methods from javascript.

I have tried below two options,but these are not working

1. gridControl = Xrm.Page.ui.controls.get("yourSubGridName");
    gridControl.refresh();

2. Xrm.Page.ui.controls.get('SuppDocsAttachments').refresh();
 

Can anyone help me to achive this?

Any suggestions/ideas would be appriciated.

Thanks & Regards,
Priyank Jain