select box onclick - rails

i have rails concentration erb code, i name box. i reload page flitting arrange parameter. controller already handles it, nonetheless i don't know reload page comparison value name box. here code:

<% @options = {:latest => 'lastest' , :alphabetical => 'alphabetical', :pricelow => 'price-low', :pricehigh =>'pricehigh'} %>
<%= select_tag 'sort[]', options_for_select(@options), :include_blank => true,:onchange => "location.reload('location?sort='+this.value)"%>