施用Ext.Ajax.request进行删除操作，在IE可以，火狐、chrome 不行

function deleteAd() {

    if (confirm('是否删除选中的信息?')) {

        var inputCode = document.getElementsByTagName("input");

        for (var i = 0; i < inputCode.length; i++) {

            if (inputCode[i].type == "checkbox") {

                if (inputCode[i].checked) {

                    var adID = inputCode[i].value;

                    Ext.Ajax.request({

                        method: 'GET',

                        params: { adID: adID },

                        url: 'Handler1.ashx',

                        success: function (response, opts) {

                            alert("成功！");

                        },

                        failure: function (response, opts) {

                            alert("失败！")

                        }

                    })

                }

            }