title: Remove block area from dhtmlx scheduler
body: <p>I am using DHTMLX Scheduler for booking an appointments. To avoid a double booking I have shown a block on a time slot which has already been selected by some other user but yet to be done with appointment process.</p>
  
  <p>I have setInterval to check the status of appointment which is currently in process by some other users.</p>
  
  <p>What I want is if I get some data in setInterval that particular block should be removed. Following is a script that I am using to show block and other appointments on scheduler.</p>
  
  <pre><code>// This is how I'm showing block area on scheduler
  
  scheduler.addMarkedTimespan({  
       start_date: new Date(2013,11,29,01,00),
       end_date: new Date(2013,11,29,01,10),
       css: "inprocess",
       sections: {
       unit: 'a7b6e635-f62f-6f12-020f-52a959d1ca47'
    }
  });
  
  // This is how I'm showing appointments on scheduler
  
  scheduler.config.multi_day = true;
  scheduler.init('scheduler_here',new Date(2013,11,29),"unit");
  scheduler.parse([{"start_date":"2013-12-29 01:13","end_date":"2013-12-29 01:23","text":"&lt;div style='float: left;'&gt;Booked&lt;\/div&gt;&lt;div style='float: right;
  scheduler.updateView();
  </code></pre>
  
  <p>The sections which are inprocess I wish to update per five seconds which is why I have call setInterval. Im getting same data in json as inprocess from setInterval. I wish to update that particular section. It could be add more block area which are in process or remove existing blocks.</p>
  
  <p>Well I already know how can I add more blocks, I'm stuck at how can I remove existing block areas/in process areas.</p>
  
  <p>*I don't want to update whole sections for that.</p>