这个问题真纠结！

Question

 <script type="text/javascript">
        function CreateXmlHttpRequest() {            try {
                if (window.XMLHttpRequest) {
                    return new XMLHttpRequest();                }
                else if (window.ActiveXObject) {
                    return ActiveXObject();
                }
                else {
                    //什么也不做忽略引发的错误！
                }            } catch (Error) {
                throw new Error("不能创建XMLHttpRequest!");
            }        }
        var xmlHttpReq = CreateXmlHttpRequest();        function CheckUserName() {
            if (xmlHttpReq) {
                var txtName = document.getElementById("txtUserName").value; //获取用户名
                if (txtName == "") {
                    document.getElementById("msgUserNameErrorInfo").innerHTML = "用户名不能为空！";
                    document.getElementById("msgUserNameErrorInfo").style.color = "red";
                    //document.getElementById("txtUserName").focus();
                }
                else {
                    document.getElementById("msgUserNameErrorInfo").innerHTML = "";                           
                }
            }        }
        function CheckPwd() {
            if (xmlHttpReq) {
                var txtPassword = document.getElementById("txtPassword").value;
                if (txtPassword == "") {
                    document.getElementById("msgPwdErrorInfo").innerHTML = "密码不能为空！";
                    document.getElementById("msgPwdErrorInfo").style.color = "red";
                   // document.getElementById("txtPassword").focus();
                }
                else {
                    document.getElementById("msgPwdErrorInfo").innerHTML = "";
                }
            }
            
        }
  </script> <table style="width: 100%;">
        <tr>
            <td>
                &nbsp;
            </td>
            <td>
                登录界面
            </td>
            <td>
                &nbsp;
            </td>
        </tr>
        <tr>
            <td>
                用户名：
            </td>
            <td>
                <input id="txtUserName" type="text" onblur="CheckUserName()" />
            </td>
            <td  id="msgUserNameErrorInfo">
            </td>        </tr>
        <tr>
            <td>
                密码：
            </td>
            <td>
                <input id="txtPassword" type="text"  onblur="CheckPwd()"/>
            </td>
            <td id="msgPwdErrorInfo">
                &nbsp;
            </td>
        </tr>
        <tr>
            <td>
                &nbsp;
            </td>
            <td>
                <input id="btnSubmit" type="button" value="登录" onclick="SendCheckInfo()" />
            </td>
            <td>
                &nbsp;
            </td>
        </tr>
    </table>

Answer 1

就是在调试的时候IE会死掉。但是谷歌 火狐没事，怎么回事？ 还有这个是htm结尾的他和html有什么区别吗？ 还有用在asp上面的代码和aspx有什么不同吗？小菜鸟一名，求告知

Answer 2

其实只要看js部分就可以了，页面只有两个文本框txtusername   txtPassword 以及激发onblur，然后我操作激发onblur时就会死掉，