(Information and examples taken from the DroidScript documentation)

Starts DroidScript application from script in file. File is the fullpath to the app. Parameter options is optional.
Intent contains information to be transferred to the other app. e.g
action
type
data
extras .
Compile your intent as an object then convert to JSON

app.StartApp(file,options,intent)

var data ={
action:"android.intent.action.VIEW",
type : "message/rfc822",
data:"/sdcard/yourfile.jpg",
extras:{name:"android.intent.extra.EMAIL",type:"list",value:"yourname@gmail.com"}
}
var intent= JSON.stringify(data)
app.StartApp("/sdcard/DroidScript/PhotoViewer/PhotoViewer.js,"",intent );
//Option can be **debug**