I have searched the internet but still haven't found the answer to my question. Hope that someone here can help me.
I want to add a conditional field to the advanced search. For example, if a visitor fills out a number in the searchfield, the results will be in a range of -10 till +10 of the filled out value so, for example, if the filled out value would be 149 the search results should include products with values from 139 till 159 for that specific attribute. Can this be realised and if so, how can I realise this in the search form?