Trojan.JS.Agent.GHP has been observed in the wild in random Java files. In particular, case study was made on the instance of the above trojan detection in the file called caption.js.
Those files are injected onto computer system via gaps in security related to Java environment in various software products of common knowledge which processes are active as the PC is connected to website spreading the malicious code.
The above name is but one of a number of detection names used by various security solutions to recognize the same threat. However, approaches to the removal of Trojan.JS.Agent.GHP differ from antivirus to antivirus.
Free scanner available here will detect all instances of the trojan and the infections it has introduced onto your PC. That is an alternative method to remove Trojan.JS.Agent.GHP that provides for prevention of the same infection invasion in future.