anchor.diff:  		document.getElementById("stuname").innerText=name;
   		
   		var canvas = document.getElementById('myCanvas');
  -		if (canvas.getContext) {
  +		if (canvas.getContext && count == 1) {
   			var ctx = canvas.getContext('2d');
   
   			ctx.strokeStyle = '#0000ff';
  
positive.code: 
  	//初始化数组数据
  	function initData() {		
  		<% String url="d:\\1.jpg";
  		List<FaceEntity> faces=new ArrayList<FaceEntity>();
  		PicFace picFace=new PicFace(new File(url));
  		faces=picFace.getFaces();
  		int size = 1;
  		size = faces.size();
  		session.putValue("picface", picFace); %>
  		//初始化二维数组
  
negative.code: 	this.width = width;       
  	this.hight = hight;
  }
  <%String url = "";%>
  //声明arr数组
  var arr = new Array();
  
  