EXT3.0實現的同步請求

注Ext3.0要比Ext2.2的麻煩
首先創建一個http
   createXhrObject:function(){
         var http;  
        var activeX = ['MSXML2.XMLHTTP.3.0', 'MSXML2.XMLHTTP', 'Microsoft.XMLHTTP'];  
 
        try {  
            http = new XMLHttpRequest();  
        } catch (e) {  
            for (var i = 0; i < activeX.length; ++i) {  
                try {  
                    http = new ActiveXObject(activeX[i]);  
                    break;  
                } catch (e) { }  
            }  
        } finally {  
            return http;  
        }
    }
2.得到從後臺請求的數據
 //獲得輸入規範的信息；
   getValidMsg:function(){  
              var conn = Clazz.createXhrObject();
              var url='pubinfo.do?Method=validMsg';       
              conn.open('post',url,false);         //Ext.Ajax同步請求
              conn.send(null);
              var json = Ext.decode(conn.responseText);
              return json
  }
json即爲從後臺請求過來的{success：true，msg:'aaa'}格式的對象