gistfile1.js

//@jpalardy knows closures
  var filterFormFields = (function() {
    var mapping = { "0" : "c_refinance",
                    "1" : "c_home_equity"
                    "2" : "c_dept_consolidation",
                    "3" : "c_new_home_purchase" };

    return function() {
      jQuery("#searchbox > div").hide();
      target =  mapping[jQuery("#reason").val()];
      jQuery("#searchbox ." + target).show();
    } 
  }   
  })();