title: how to pass parameter in combobox(EXTJS) in javascript to php file?
body: <p>First I declared an Ext.form.ComboBox which name is leventcombo and also I created a store Ext.data.JsonStore its name is leventstore. I can reach the php file  and  the data can return the javascript. But I cannot pass id value to the php file. how can I send it?</p>
  
  <pre><code>var leventcombo = new Ext.form.ComboBox({
      store: leventstore,// call jsonstore
      fieldLabel: '',
      minChars: 2,
      width:50,
      displayField:'isim',
      valueField: 'isim',
      typeAhead: false,
      loadingText: dil('Aranıyor...'),
      hideTrigger:true, 
      tpl: template1,
      emptyText: dil('levo ...'),
      itemSelector: 'div.search-item',
      name: 'leventwindeneme',
      id: 'leventwindenemeID',
      anchor: '100%',
      allowBlank:false,
      listeners:{
         beforequery: function(){
         }   
      }            
  });
  
  
  var leventstore = new Ext.data.JsonStore({
      totalProperty: 'results',
      root: 'rows',
      id: 'id',
      proxy: new Ext.data.HttpProxy({
         url: 'phps/leventstore.php?lang=dil(lang)'
      }),
      fields: [
      {
         ///phpden dönen veriler
         name:'id'
      },{
         ///phpden dönen veriler
         name:'isim'
      }]
  });
  </code></pre>
  
  <p>leventstore.php:</p>
  
  <pre><code>&lt;?php
  include_once("kutuphane/inc.php");
  $sql="select id, isim  from levent";
  $_SESSION["VT"]-&gt;doQuery($sql);
  $donecek = $_SESSION["VT"]-&gt;arrayYapVer();
  
  $veriler=array();
  if (sizeof($donecek) &gt; 0) {
      foreach ($donecek as $file) {
          $tempFi = array();
          $tempFi = array(
              "id" =&gt; $file["id"],
              "isim" =&gt; $file["isim"]
  
          );
          array_push($veriler, $tempFi);
      }
  }
  $donecek = array("results" =&gt; (sizeof($donecek)), "success" =&gt; "true", "rows" =&gt; $veriler);
  echo json_encode($donecek);
  ?&gt;
  </code></pre>