Teenagers have boasted about beating a student unconscious in a rap song posted on the internet.

Willem Haymaker was attacked by up to eight youths as he walked through Egerton Park, near St Paul's Church, in Bexhill, last October, after a night out with friends.

Two boys, aged 15 and 16, admitted taking part in the attack and were given supervision orders at Hastings Youth Court in December.

Willem and his father, Rev William Haymaker, are angry and shocked after hearing of the rap song, posted on the website www.bebo.com.

Rev Haymaker said: "We don't have words to describe our shock to learn that a song has been created celebrating their assault, their enjoyment at the blood and suffering, and providing a cold and calculated testimony as to what they did."

Rev Haymaker said a stranger came up to him in the street and told him about the video.

He said: "I am quite recognisable and people know my children because they are just so nice, they are always getting involved in community activities. A lady came up to me, she was very distressed, and told me about the video."

Four boys appear in the rap video. In it they boast that they "flying kicked the kid", saying "this is how the story goes, broke an innocent boy's nose, blood all over my clothes".

Rev Haymaker said the shock of the video may have had an even greater impact on Willem than the assault.

Willem has suffered permanent damage to his sight and needs further operations to rebuild his nose, which was broken in the attack.

Yesterday Willem and his father visited Bexhill and Battle MP Greg Barker at the House of Commons with a list of complaints they have against Sussex Police following the investigation and prosecution of the two boys who admitted taking part in the attack.

They include the alleged failure of the police to collect evidence and CCTV footage which could have helped identify more of Willem's attackers.

A spokeswoman for Sussex Police said: "This will be dealt with through our formal complaints procedure." She said Sussex Police had asked for advice from the Crown Prosecution Service with regards to the rap song.

A spokeswoman for Bebo said: "Following the report of abuse Bebo has removed this content from its site. Bebo is working hard to ensure our site is not abused.

"One of the key messages we are communicating to online users is that you are not anonymous online. Every time you connect to the web your internet service provider allocates a unique number which is linked to your real world address; even if you provide fake details to set up your online presence."