span隐藏后再次显示，位置变了…

Question

html：单月查询:<input type="radio" onclick="return sign();" name="select" />
                    &nbsp;&nbsp;&nbsp;&nbsp; 多月查询:<input type="radio" onclick="return more();" name="select" />
                    &nbsp;&nbsp;&nbsp;&nbsp; 查询日期： <span>
                        <asp:DropDownList runat="server" ID="ddlYear">
                        </asp:DropDownList>
                        &nbsp;&nbsp;
                        <asp:DropDownList runat="server" ID="ddlMonth">
                        </asp:DropDownList>
                    </span>&nbsp; <span id="endDate">——&nbsp;
                        <asp:DropDownList runat="server" ID="ddlYearEnd">
                        </asp:DropDownList>
                        &nbsp;&nbsp;
                        <asp:DropDownList runat="server" ID="ddlMonthEnd">
                        </asp:DropDownList>
                    </span>js<script type="text/javascript" language="javascript">
        function sign() {
            var newSpan = document.getElementById("endDate");
            newSpan.style.display = "none";
        }
        function more() {
            var newSpan = document.getElementById("endDate");
            newSpan.style.display = "block";
        }
    </script>初始效果是在一行，点击多月查询时结束年月另起了一行…这是为什么？查看源文件没发现什么区别…

Answer 1

 newSpan.style.display = "block";
block就是显示并独占一行的，如果要显示并不独点一行，可以指定float，
或者有预留空间的话，用visibility:visible /hidden 显示隐藏

Answer 2

newSpan.style.display = "inline";
不要block

Answer 3

<script src="Scripts/jquery-1.4.1.min.js" type="text/javascript"></script>
    <script type="text/javascript" language="javascript">
        function sign() {
            //var newSpan = document.getElementById("endDate");
            //newSpan.style.display = "none";
            $("#endDate").hide();//引用jquery
        }
        function more() {
            //var newSpan = document.getElementById("endDate");
            //newSpan.style.display = "block";
            $("#endDate").show();
        }
    </script>