function checkCode(n) {
	var verifycode = document.getElementById("verifycode")
	if (n == 0 && verifycode.value == ""){verifycode.value="";verifycode.style.cssText = "color:#000000"}
	if (n == 1 && verifycode.value == ""){verifycode.value = "";verifycode.style.cssText = "color:#aaaaaa"}
}
function login_onclick() {
        if (document.login_club.DengLuYongHuMing.value == "") {
                alert ("请输入您的登录用户名!");
                document.login_club.DengLuYongHuMing.focus();
                return false;
        }
        if (document.login_club.DengLuMiMa.value == "") {
                alert ("请输入您的登录密码!");
                document.login_club.DengLuMiMa.focus();
                return false;
        }
        if (document.login_club.verifycode.value == "" || document.login_club.verifycode.value == "") {
                alert ("请输入您的登录验证码，验证码为右侧四位数字!");
                document.login_club.verifycode.focus();
                return false;
        }    
}