fixing duplicate when updating design

app/assets/javascripts/design_temp.js

@@ -17,7 +17,7 @@ $('input.multi_files').change(function(){
 });
 
 $('a.remove_mark').live("click",function(){
-  $(this).prev("input").value("true");
+  $(this).prev("input").val("true");
   $(this).parent().css("text-decoration","line-through")
   $(this).remove();
   return false;