實現登入提示，文字框獲得焦點時提示消失，失去焦點且文字框未輸入任何文字時顯示提示

HTML：

    <div class="userInfo">
        <form method="post" id="goto" action="~/Login/LoginUser">
            <ul>
                <li>
                    @Html.TextBoxFor(x => x.CompanyName, new { @class = "input wu",@valType="required", @dfltValue = "企業名稱", @msg = "<font>*</font>企業名稱不能為空" })
                </li>
                <li>
                    @Html.TextBoxFor(x => x.UserAccount, new { @class = "input wu", @valType = "required", @dfltValue = "使用者賬號", @msg = "<font>*</font>使用者賬號不能為空" })
                </li>
                <li >
                    @Html.TextBoxFor(x => x.UserPwd, new { @class = "input wu", @valType = "required", @dfltValue = "使用者密碼", @msg = "<font>*</font>密碼不能為空" })
                </li>
                <li>
                    @Html.TextBoxFor(x => x.ValidateCode, new { @class = "input1 wu", @valType = "required", @dfltValue = "驗證碼" })

                    <span class="yzm"><img class="ValidateCode" src="@Url.Action("GetValidateCode", "Login", new { timestamp = DateTime.Now.Ticks })" width="74" height="30" style="cursor:pointer" alt="看不清請點選重新整理驗證碼" title="看不清請點選重新整理驗證碼" /><a href="javascript:void(0)" flag="freshValidateCode">點選重新整理</a></span>
                </li>
                <li><input name="" type="checkbox" class="gxk" value="" /><span class="fuw">記住密碼</span></li>
                <li class="post jz"><a href="javascript:login()">登入</a></li>
            </ul>
        </form>
    </div>
 

JS指令碼如下：

但是IE8及以下版本對於密碼框這一塊並不相容。因為IE8不支援修改input文字框的type屬性。真的好賤。怎麼解決啊！

    $(document).ready(function () {

        $(":input").each(function () {
            $(this).val($(this).attr("dfltValue"));            
            
            $(this).focus(function () {               
                $(this).addClass("focus");
                if ($(this).attr("dfltValue") == $(this).val()) {
                    $(this).val("");                  
                    if ($(this).attr("dfltValue") == "使用者密碼") {
                        this.type = "password";
                    }
                }

            }).blur(function () {               
                if ($(this).val() == '') {
                    $(this).removeClass("focus");
                    $(this).val($(this).attr("dfltValue"));
                    if ($(this).attr("dfltValue") == "使用者密碼") {
                        this.type = "text";
                    }
                }
            });

        })

    })