implement joining table

app/assets/javascripts/user/application.js

@@ -0,0 +1,38 @@
+// This is a manifest file that'll be compiled into application.js, which will include all the files
+// listed below.
+//
+// Any JavaScript/Coffee file within this directory, lib/assets/javascripts, vendor/assets/javascripts,
+// or vendor/assets/javascripts of plugins, if any, can be referenced here using a relative path.
+//
+// It's not advisable to add code directly here, but if you do, it'll appear at the bottom of the
+// the compiled file.
+//
+// WARNING: THE FIRST BLANK LINE MARKS THE END OF WHAT'S TO BE PROCESSED, ANY BLANK LINE SHOULD
+// GO AFTER THE REQUIRES BELOW.
+//
+//= require jquery
+//= require jquery_ujs
+//= require jquery-ui
+//= require twitter/bootstrap
+//= require_directory .
+//= require_self
+var path_mapping = {
+  user_root: '/user',
+  join_occupied_table: '/user/join_occupied_table',
+  list_products_for_table: '/user/list_products_for_table',
+  list_products: '/user/list_products'
+}
+function redirect_to(mapping, variables){
+  variables || (variables = {});
+  var vars = []
+  for(var name in variables){
+    vars.push(name + '=' +variables[name])
+  }
+  window.location = path_mapping[mapping] + '?' + vars.join('&')
+}
+function currency(num) {
+  if (isNaN(num) || num === '' || num === null) {
+    num = 0.0;
+  }
+  return '€ ' + parseFloat(num).toFixed(2);
+}