1. A method for supporting input of one or more search parameters of a search engine in an input field, comprising: receiving input of a text character string including one or more search parameters in the input field displayed on a display device, wherein said text character string represents a search condition; determining a selection type in response to a user selection of a part of the text character string; displaying on the display device one or more search options of the search parameters depending on the determined selection type; and in response to the user selection of a desired search option, transforming said text character string to include the desired search option selected and displaying the transformed text character string on the display device; wherein said search options include search field specification, wild card, fuzzy search, proximity search, range search, search term boosting, Boolean operator, grouping and field grouping.