anchor.diff:  			  Object temp1 = session.getAttribute("coursesInfo");
   			  course = (ArrayList<CourseInfo>) temp1;
   			  String cname = course.get(0).getCname();
  -			  String urlpic = (String)session.getAttribute("classPicUrl");%>
  +			  url = (String)session.getAttribute("classPicUrl");%>
   			
   			document.getElementById("courseTeancher").innerHTML= str;
  -			var bgurl = '"url('+<%=urlpic%>+')"';
  +			var bgurl = '"url('+<%=url%>+')"';
   			if(bgurl==null){
   				document.getElementById("bgurl").innerHTML="还未开始点名或者图片上传不成功，请耐心等候";
   				}else{
  
positive.code: 	}
  	
  	function judge(){
  		var count = <%=session.getAttribute("coursesNum")%>;
  		//var testimg = "images/test.jpg";
  		//document.getElementById("myCanvas").style.backgroundImage="url("+urlpic+")";
  		if ( count == 1 ){//当天有一节课，返回SUCCESS
  
negative.code: 
  	//初始化数组数据
  	function initData() {		
  		<% //url ="d:\\1.jpg";
  		List<FaceEntity> faces=new ArrayList<FaceEntity>();
  		PicFace picFace=new PicFace(new File(url));
  		faces=picFace.getFaces();
  		int size = 0;
  		size = faces.size();
  		session.putValue("picface", picFace); %>
  		//初始化二维数组
  