title: Random numbers added to extjs data store ajax call
body: <pre><code> var resource_store = Ext.create('Ext.data.Store', {
   pageSize: 10,
  autoLoad: true,
  fields: ['id','r_number','c_number','resource_name','resource_desc','resource_url','resource_file'],
  proxy: {
      type: 'ajax',
      url: BASE_URL+'courses/resources/displayResources/'+course_id,
      reader: {
          type: 'json',
          root: 'results'
     }
  },
  storeId: 'id'
  });
  </code></pre>
  
  <p>I'm using Extjs4 data store like this way.
  When i see the ajax calls a random number is appended to the url</p>
  
  <pre><code>http://localhost/Edu_web/index.php/courses/resources/displayResources/PTGRE14?_dc=1328442262503&amp;page=1&amp;start=0&amp;limit=10
  </code></pre>
  
  <p>Even though i use 
  <code>actionMethod:{
  read: 'POST'
  }</code>.</p>
  
  <p>?_dc=1328442262503 still appears in the url.</p>
  
  <p>how to remove these parameters in url. and send any parameters through POST</p>