var wait = 60;  
get_code_time = function (o) {  
    if (wait == 0) {  
        o.removeAttribute("disabled");  
        o.value = "免费获取验证码";  
        wait = 60;  
    } else {  
        o.setAttribute("disabled",true);  
        o.value = "(" + wait + ")秒后重新获取";  
        wait--;  
        setTimeout(function() {  
            get_code_time(o)  
        },1000)  
    }  
}

获取手机短信之后调用get_code_time函数代码

//重新获取验证码
$('#codeagain').click(function() {

var o = this;  
$.ajax({  
    url:"Tea_sendCode.action?jsoncallback=?",type:"post",data: {accountId:accountId},dataType: "json",success: function (data) {  
        if(data.status == 1 && data.code == 200){  
            alert("验证码已发送至您的手机");  
            get_code_time(o);  
        } else {  
              
            if(data.msg != ""){  
                alert(data.msg);  
            } else {  
                alert("短信验证码发送失败");  
            }  
        }  
    },error: function (data) {  
        if(data.status == 0) {  
            alert(data.msg);  
        } else {  
            alert("短信验证码发送失败");  
        }  
    }  
});

});