为什么这个不显示。。

<script>
var tree = new WebFXTree("全站","javascript:goto('mainFrame','news/news_list.jsp?classId=0')");
tree.setBehavior('classic');

<c:forEach var="daohang" items="${dlist}" >
var tmp = "tree_images/foldericon.gif";
var tmp1 = "tree_images/openfoldericon.gif";
var t_${newsClass.cid} = new WebFXTreeItem("${daohang.dhname }","",'',tmp,tmp1);
tree.add(t_${daohang.dhid });
<c:forEach var="newsClass" items="${nslist}">
<c:if test="${newsClass.tietouDaohang.dhid == daohang.dhid}">
var tmp = "tree_images/file.png";
var tmp1 = "tree_images/file.png";
var t_${newsClasst.cid} = new WebFXTreeItem("${newsClass.ncname }","javascript:executeGoto('mainFrame','news/news_list.jsp?classId=${newsClass.ncid }','${newsClass.ncid }')",'',tmp,tmp1);
t_${daohang.dhid}.add(t_${newsClass.ncid });
</c:if>
</c:forEach>
</c:forEach>

var t_recyclebin = new WebFXTreeItem("回收站","javascript:goto('mainFrame','news/news_del_list.jsp')",'','tree_images/recyclebin.gif','');
tree.add(t_recyclebin);

document.write(tree);
</script>