1.

		$.ajax({
			type:"post",dataTyep:"json",async: false,//取消异步
			url:"check_username.jspx",data:{
				username:username
			},success : function(result) {
				if (result.result == 0) {
					$("#uName").show();
					$("#uName").html("用户名已经使用");
					flag = false
				} else {
					$("#uName").hide();
					flag = true
				}
			}
		})

		$.post($("#registform").attr("action"),$("#registform").serialize(),function(result) {
			if(result.success) {
				layer.msg("注册成功！");
				setInterval("window.location.href = '/';",1000);
				return ;
			}
			layer.msg("注册失败！" + result.FailedMessage);
		});