The seal in the valve needs replacing - a complete valve with float etc may be bought relatively cheaply. If you can turn off the water and are handy with a spanner then it's an easy job. Or call a neighbour or even a plumber.
Richard Buxton
October 2008
Automatic Answer
We may have found other answers which could help you.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix toilets.