Ext异步加载与同步加载

function(url) {      
    function createXhrObject() {      
        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;      
        }      
    };      
     
    var conn = createXhrObject();      
    conn.open("GET", url, false);      
    conn.send(null);      
    if (conn.responseText != '') {      
        return Ext.decode(conn.responseText);      
    } else {      
        return null;      
    }      
};    

function(url) {   
    function createXhrObject() {   
        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;   
        }   
    };   
  
    var conn = createXhrObject();   
    conn.open("GET", url, false);   
    conn.send(null);   
    if (conn.responseText != '') {   
        return Ext.decode(conn.responseText);   
    } else {   
        return null;   
    }   
};  
 

 

Ext3.0中异步加载方式：

Js代码 
Ext.Ajax.request({   
    url : '',   
    params : { },   
    method : 'POST',   
    success : function(response) {   
        var result = Ext.util.JSON.decode(response.responseText);   
        Ext.Msg.alert('信息', result.msg);   
    },   
    failure : function(response, options) {   
    }   
})  

Ext.Ajax.request({
    url : '',
    params : { },
    method : 'POST',
    success : function(response) {
        var result = Ext.util.JSON.decode(response.responseText);
        Ext.Msg.alert('信息', result.msg);
    },
    failure : function(response, options) {
    }
}) 

Ext3.0中表单Ajax提交

Js代码 
form.form.submit({   
    waitMsg : '正在提交数据请稍后',// 提示信息   
    waitTitle : '提示',// 标题   
    url : '',// 请求的url地址   
    method : 'POST',// 请求方式   
    success : function(form, action) {// 加载成功的处理函数   
        Ext.Msg.alert('提示', action.result.msg);   
    },   
    failure : function(form, action) {// 加载失败的处理函数   
        Ext.Msg.alert('提示', '');   
    }   
});