jQuery ajax在IE下处理url=""时的一个不兼容

小猪之前写了这么个代码：

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AJAX = function (data, url, beforesendfn, onsuccessfn, onerrorfn, oncomplete) {        $.ajax({             type: "POST",             url:url             cache: false,             data: JSON.stringify(data),             contentType: "application/json; charset=utf-8",             dataType: "json",             beforeSend: beforesendfn,             success: onsuccessfn,             error: onerrorfn,             complete: oncomplete         }); }

这段代码实际上是没有什么问题的。

但是在调用代码的时候小猪使用了的参数

1	var action = url == undefined ? "" : url;

这样在没有定义url的情况下url转换成“”。本意是想Post到当前页面地址。

在Chrome下和FireFox下都是没问题的，但是在IE下却不能post到对应地址。

所以为了兼容IE 小猪只好写了下述可怜的代码

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AJAX = function (data, url, beforesendfn, onsuccessfn, onerrorfn, oncomplete) {     if (url == undefined || url == "") {         $.ajax({             type: "POST",             cache: false,             data: JSON.stringify(data),             contentType: "application/json; charset=utf-8",             dataType: "json",             beforeSend: beforesendfn,             success: onsuccessfn,             error: onerrorfn,             complete: oncomplete         });     } else {         $.ajax({             type: "POST",             url:url,             cache: false,             data: JSON.stringify(data),             contentType: "application/json; charset=utf-8",             dataType: "json",             beforeSend: beforesendfn,             success: onsuccessfn,             error: onerrorfn,             complete: oncomplete         });     } }