Jquery加载回调函数在Internet Explorer中不起作用

Question

我的网页在所有浏览器中都正常加载。但回调函数不会在Internet Explorer中调用单选按钮更改事件。即调试代码不显示：

alert("btn changed: "+ counter++);

IE中的

（所有版本7,8,9和10）。

我不确定它有什么问题。

请帮助：

$("#payment_page").load('/forms/loader/pt-payment.html', function () {
    var Cfee = 0;
    var oetptAmount = 0;
    var counter = 0;
    $('input:radio[name="Course_Selection"]').change(function () {
        alert("btn changed: " + counter++);
        if ($("#oet").is(':checked')) { //oet FT
            // append goes here
            Cfee = oetFT;
            //console.log(Cfee);
            calculator(Cfee);
        } else if ($("#clinical").is(':checked')) { //clinical FT
            Cfee = clinicalFT;
            //console.log(Cfee);
            calculator(Cfee);
        } else if ($("#clinical2").is(':checked')) { //clinical PT
            Cfee = clinicalPT;
            //console.log(Cfee);
            calculator(Cfee);
        } else if ($("#oetpt").is(':checked')) { //oet PT
            //console.log("oetptcalled");
            $('input:checkbox[name="Select_Module"]').off('change').on('change', function () {
                if ($(this).is(':checked')) {
                    // append goes here

                    oetptAmount = oetptAmount + oetPT;
                    //console.log("checked: "+oetptAmount); 
                    calculator(oetptAmount);
                } else {
                    oetptAmount = oetptAmount - oetPT;
                    //console.log("unchecked: "+oetptAmount);
                    calculator(oetptAmount);
                }
            });
        } //end if
    });
});