<script type='text/javascript'>

//Enter conditions here to determine whether or not visitor is a registered user.
window.isRegisteredUser = false;

//Global variable to determine amount of time spent on site.
var SECONDS_SPENT_ON_SITE = 120;

olark('api.rules.defineRule', {

       // Specify a unique ID for this rule.  This helps the API to keep your
       // rules separate from each other.
       id: '1',

       // The description is a good way to summarize what this rule is doing
       description: "offer help to a visitor after he has spent x amount of time on site and if he is not a registered user",

       // The condition will be checked whenever there is a relevant change
       // in the chat, just call pass() whenever it meets the criteria
       condition: function(pass) {

           // you can use the Visitor API to get information like page count, seconds spent on site, etc.
           olark('api.visitor.getDetails', function(details){

               if (details.secondsSpentForThisVisit >= SECONDS_SPENT_ON_SITE && !details.isConversing && !window.isRegisteredUser) {
                   // we have met the condition of time spent is over SECONDS_SPENT_ON_SITE,
                   // and the visitor has not started chatting yet,
				   // and the visitor is not a registered user
                   // so mark this condition as passed
                   pass();
               }

           });

       },

       // The action will be executed whenever the condition passes.  You can
       // automatically limit the number of times this action will trigger by
       // using the perPage, perVisit, and perVisitor options.
       action: function() {
           olark('api.chat.sendMessageToVisitor', {
               body: "Hi, have any questions about our products?"
           });
       },

       // Restrict the action to execute only once per visit, that way offering
       // help doesn't happen over and over for the same visitor
       perVisit: true

   });
</script>