function checkdata(){
	var username = $('#account').attr('value');
	var password = $('#password').attr('value');
	var schoolid = $('#schoolid').attr('value');
	if(username == "" || username == null){
		alert("请输入用户名！！！");
		return false;
	}
	if(password == "" || password == null){
		alert("请输入密码！！！");
		return false;
	}
	if(schoolid == -1){
		alert("请选择学校！！！");
		return false;
	}

	return true;	
}