javascript - jQuery: User must stay on page for determined time to show content -

i'm having problems code. can see below, content of post shown if user click on link provided. unlock action. need user must stay on page @ least seconds before unlock content. if user leave page before determined time, content won't show. way it?

jquery(document).ready(function(){ var clicked = new set;    jquery('.button').click(function() {      clicked.add(this);         if(clicked.size>=10) jquery('.pagelocked').hide();         if(clicked.size>=10) jquery('.content').show();      }); }); 

perhaps use settimeout display content after length of time.

$('.button').click(function() {     settimeout(function() {          $('.pagelocked').hide();         $('.content').show();     },10000);  });