js 控制显示加减号

方法1：

<td id="imgmenu1" height="28" class="menu_title" style="cursor:hand"><img id="i1" src="images/NodeClose.jpg" onclick="chkClick(this);" /><span>社会科</span></td>


<script type="text/javascript">
<!--
function chkClick(img)
{
img.src = img.src.toLowerCase().indexOf("NodeClose.jpg")!=-1?"images/NodeOpen.jpg":"images/NodeClose.jpg";
-->
</script>

方法2：

<script type="text/javascript">var SwitchPicArr = new Array("../Images/black_minus.jpg","../Images/black_plus.jpg")   function setDetailMsgRow(rowID, btn) {        var row = document.getElementById(rowID);        if (row != null) {            if (row.style.display == (document.all ? "block" : "table-row")) {                row.style.display = "none";                 if (btn != null) {                     btn.style.backgroundImage = "url(" + SwitchPicArr[1] + ")";                }            }            else {                row.style.display = (document.all ? "block" : "table-row");                if (btn != null) {                    btn.style.backgroundImage = "url(" + SwitchPicArr[0] + ")";                }            }        }//        if (btn != null) {////            if (btn.value != "Hide Detail") {////                btn.value = "Hide Detail";////            }////            else {////                btn.value = "Display Detail";////            }//        }    }</script> .cshtml 部分：  @if (item.MessageDetail == "")                                { @Html.Raw(" ")}                                else {                                      <input type=button value="" onclick="setDetailMsgRow('@sTmpRowID',this)" style="background:url(../Images/black_plus.jpg);width:40px;height:40px"/>                                }

用XML和XSLT进行高级的Web UI设计（一）

http://www.vckbase.com/index.php/wv/199