ubermajestix/dont_nav_elsewhere.html.erb

## dont_nav_elsewhere.html.erb
# in your layout
<head>
  <%= stylesheet_link_tag'styles' %>
  <%= javascript_include_tag :defaults %>
  <%= yield :script %>
</head>
<body>
 # ...

# in the view you don't want your user to navigate away from
# this is nice on very important forms or a multistep process/wizard kind of deal.

<% content_for :script do %>
  <script type="text/javascript">
    // set a global js var to control whether or not users see the "don't navigate away please" dialog
    // set this var to false on links or forms that can navigate away from page in an onclick property
    var confirmation_needed = true;

    window.onbeforeunload = confirmExit;

    function confirmExit(){
      if(confirmation_needed){
       // if you return a string it will be displayed in between "don't navigate away"
       // and "click Ok to navigate away or cancel to stay put" in the confirm dialog
        return "Ahoy!\n\n You done doing this awesomely important task?";
      }
    }
  </script>
<% end %>

# below is an example of a link that can navigate away from the page without the above confirm dialog
# note that we set confirmation_needed to false before we do a different confirm message.

<%= link_to "cancel what i'm doing", destroy_this_info_path, :onclick => "confirmation_needed = false; confirm('You are about to destroy all this info');"%>

# the "don't nav elsewhere" dialog will appear on all forms that try to submit also
# we have to again set confirmation_needed to false, I do this in the submit_tag helper:

<% form_tag create_somestuff_path do%>
  <%= text_field_tag :somestuff, "somestuff" %>
  <%= submit_tag "save", :onclick=>"confirmation_needed = false;"%>
<% end%>
	# in your layout
	<head>
	<%= stylesheet_link_tag'styles' %>
	<%= javascript_include_tag :defaults %>
	<%= yield :script %>
	</head>
	<body>
	# ...

	# in the view you don't want your user to navigate away from
	# this is nice on very important forms or a multistep process/wizard kind of deal.

	<% content_for :script do %>
	<script type="text/javascript">
	// set a global js var to control whether or not users see the "don't navigate away please" dialog
	// set this var to false on links or forms that can navigate away from page in an onclick property
	var confirmation_needed = true;

	window.onbeforeunload = confirmExit;

	function confirmExit(){
	if(confirmation_needed){
	// if you return a string it will be displayed in between "don't navigate away"
	// and "click Ok to navigate away or cancel to stay put" in the confirm dialog
	return "Ahoy!\n\n You done doing this awesomely important task?";
	}
	}
	</script>
	<% end %>

	# below is an example of a link that can navigate away from the page without the above confirm dialog
	# note that we set confirmation_needed to false before we do a different confirm message.

	<%= link_to "cancel what i'm doing", destroy_this_info_path, :onclick => "confirmation_needed = false; confirm('You are about to destroy all this info');"%>

	# the "don't nav elsewhere" dialog will appear on all forms that try to submit also
	# we have to again set confirmation_needed to false, I do this in the submit_tag helper:

	<% form_tag create_somestuff_path do%>
	<%= text_field_tag :somestuff, "somestuff" %>
	<%= submit_tag "save", :onclick=>"confirmation_needed = false;"%>
	<% end%>