fix typo in #strainInput keypress handler (wich -> which)

src/couchapp/secreton/_attachments/index.html

@@ -153,7 +153,7 @@ $(".tooltip a" , "#results").live('mouseenter', function(){
   });
   
   $("#strainInput").keypress(function(event){
-      if(event.wich == 13){
+      if(event.which == 13){
     	  strain= $(this).attr("value");
           params = { key: '"'+strain+'"' };
           get_results( 'by_replicon_strain', params);