JQuery AJAX

注意:dType  "htm","xml","json" ,如果返回的数据没有对应dType所指定的类型，那么$.ajax对象将会回调error函数

function ExectueSc(myUrl, argObj, waitObj,dType) {
    var obj;
    if (!dType) {
        dType = "json";
    }
    $.ajax({
        cache: false,
        async: false,
        dataType: dType,
        type: "POST",
        url: myUrl,
        beforeSend: this.ExectueScWait(waitObj),
        data: argObj,
        success: function(ret) {
            obj = ret;
        },
        error: function() {
            obj = '网络连接错误！';
        }
    });
    return obj;
}

function ExectueScWait(waitObj) {
    document.getElementById(waitObj).innerHTML = '<img src="http://www.cnblogs.com/img/loading55.gif"/>请稍后...';
}