Get an off camera flash mate. Some are wireless,some need a lead from the cameras hot shoe to the flash itself.The onboard pop up flash is usually crap at most things.
I only know the Nikon system which has an inbuilt wireless system, but wireless flash triggers are cheap enough.
The use of flash in photography can get very complicated and expensive, but to get you started it should not cost too much:
http://www.ebay.com.au/itm/YONGNUO-Y...item232754255c
http://www.ebay.com.au/itm/Yongnuo-R...item256d2bd1e1