JavaScript里面用C:if标签显示语法错误

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这个不是js的标签，而是jsp标准库的标签。http://www.runoob.com/jsp/jstl-core-if-tag.html

function admin() { var url="<%=path %>/login.jsp"; window.open(url,"_blank"); } function zuoyestu_tijiao(user) { if(user==null) alert("请先登录"); else if(user!=null && user.type=="2"){ var url="<%=path %>/qiantai/zuoyestu/zuoyestu_tijiao.jsp"; window.location.href=url; } } function zuoyestu_mine(user) { if(user==null) alert("请先登录"); else if(user!=null && user.type=="2"){ var url="<%=path %>/zuoyestu?type=zuoyestu_mine"; window.location.href=url; } } function liuyanAll(userType) { if(userType==null) alert("请先登录"); else{ var url="<%=path %>/liuyan?type=liuyanAll"; var targetWinName="newWin"; var features="width="+screen.width-200+" ,height="+screen.height-150+" ,toolbar=no, top=0, left=0, menubar=no, scrollbars=no, resizable=no,location=no, status=no" var new_win=window.open(url,targetWinName,features); } }