Open new mail from custom entity with parameters

Hi,

I want to open new mail form custom entity.  I created one button for this and when I click on this button it open email activity.  I need to take default parameters also from custom entity when open the new mail. I have used the following command in java script for this.  can you help me how to take default parameters like to,subject from the custom entity.

I have used the following command.

Xrm.Utility.openEntityForm(name,id,parameters)

But I did n't get any good solution to passparamets.  How the parameters separate to and subject.

Please help to solve this issue.

Regards,

Noushad

pnoushu@hotmail.com