Count & Close all browsers

QTP Script to get total count, names of all open browsers and to close them using descriptive programming..

Set ab=Description.Create
ab("micclass").value="Browser"
Set obj=Desktop.ChildObjects(ab)
msgbox obj.count
For i=0 to obj.count-1
c=obj(i).getroproperty("name")
msgbox(c)
obj(i).Close
Next