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Combine Ext ux form SearchField and php script

<!-- /*!  * Ext JS Library 3.0.0  * Copyright(c) 2006-2009 Ext JS, LLC  * licensing@extjs.com  * http://www.extjs.com/license  */ --> <html> <head> <title>Hello World Window</title> <link rel="stylesheet" type="text/css" href="ext-3.0.0/resources/css/ext-all.css" /> <script type="text/javascript" src="ext-3.0.0/adapter/ext/ext-base.js"></script> <script type="text/javascript" src="ext-3.0.0/ext-all.js"></script> <script type="text/javascript" src="ext-3.0.0/examples/ux/SearchField.js"></script> </head> <!-- Revised from demo code in ext3.0.0 --> <body> <script type="text/javascript"> /*!  * Ext JS Library 3.0.0  * Copyright(c) 2006-2009 Ext JS, LLC  * licensing@extjs.com  * http://www.extjs.com/license  */ Ext.onReady(function(){     var ds = new Ext.data.Store({         proxy: new Ext.data.ScriptTagProxy({             url: 'http://extjs.com/forum/topics-remote.php'         }),         reader: new Ext.data.JsonReader({             root: 'topics',             totalProperty: 'totalCount',             id: 'post_id'         }, [             {name: 'postId', mapping: 'post_id'},             {name: 'title', mapping: 'topic_title'},             {name: 'topicId', mapping: 'topic_id'},             {name: 'author', mapping: 'author'},             {name: 'lastPost', mapping: 'post_time', type: 'date', dateFormat: 'timestamp'},             {name: 'excerpt', mapping: 'post_text'}         ]),         baseParams: {limit:20, forumId: 4}     });     // Custom rendering Template for the View     var resultTpl = new Ext.XTemplate(         '<tpl for=".">',         '<div class="search-item">',             '<h3><span>{lastPost:date("M j, Y")}<br />by {author}</span>',             '<a href="http://extjs.com/forum/showthread.php?t={topicId}&p={postId}" target="_blank">{title}</a></h3>',             '<p>{excerpt}</p>',         '</div></tpl>'     );     var panel = new Ext.Panel({         applyTo: 'search-panel',         title:'Forum Search',         height:300,         autoScroll:true,         items: new Ext.DataView({             tpl: resultTpl,             store: ds,             itemSelector: 'div.search-item'         }),         tbar: [             'Search: ', ' ',             new Ext.ux.form.SearchField({                 store: ds,                 width:320             })         ],         bbar: new Ext.PagingToolbar({             store: ds,             pageSize: 20,             displayInfo: true,             displayMsg: 'Topics {0} - {1} of {2}',             emptyMsg: "No topics to display"         })     });     ds.load({params:{start:0, limit:20, forumId: 4}}); }); </script>  <div style="width:600px;" id="search-panel"> </div> </body> </html>