Hello Saniya,
Got to Run->External Tools->Open External Dialog in Eclipse.
Click on Program and click "New Launch Configuration" button above that panel.
In the right side give the name as JBoss and fill the location text by using button "Browse File System...".
Click on Apply and Run.
Your jboss will run for you..
Next time to run Jboss you can use the run button in the toolbar above in eclipse that will have ur jboss in the list.