text: //点击换一张验证码
  function changeImg() {
  	var imgSrc = $("#imgObj");   
      var src = imgSrc.attr("src");   
      imgSrc.attr("src",chgUrl(src));  
      $("#info").html("");
  }
  //时间戳   
  //为了使每次生成图片不一致，即不让浏览器读缓存，所以需要加上时间戳   
  function chgUrl(url) {
  	var timestamp = (new Date()).valueOf();
  	var dex=url.indexOf("drawImage")+"drawImage".length;
      url = url.substring(0, dex);
  	if ((url.indexOf("&") >= 0)) {
  		url = url + "×tamp=" + timestamp;   
  	} else {
  		url = url + "?timestamp=" + timestamp;   
  	}
  	return url;
  }
  //验证码验证
  function isRightCode() {
  	var code = $("#veryCode").attr("value");
  	//alert(code);
  	code = "c=" + code;
  	$.ajax( {
  		type : "POST",
  		url : "ResultServlet",
  		data : code,
  		success : callback
  	});
  }
  //验证以后处理提交信息或错误信息
  function callback(data) {
  	if(data.toString()==1)
  	{
  		$("#info").html("xw素材网提醒您：成功了！");
  	  return;
  	}else
  	{
  		$("#info").html(data);
  		return;
  	}
  }  
  