javascript - 如何让javascript中的错误信息在更正后消失？

Question

var v4 = document.f1.address.value; 
if(v4=="" || v4.trim().length==0) 
{ 
    valMessage('addressmsg','Please enter address'); 
    document.f1.address.focus(); 
    return false; 
} 

var v5 = document.f1.city.value; 
if(v5=="" || v5.trim().length==0) 
{ 
    valMessage('citymsg','Please enter your city'); 
    document.f1.city.focus(); 
    return false; 
}

function valMessage(divName, content) { 
    document.getElementById(divName).innerHTML = content; 
} 

更正后错误消息不会消失。该怎么办？html body 中给出的分区 ID 不用担心

Answer 1

您可以显示/隐藏 divName 元素，其中 showDiv 是 bool 值(true/false):

function valMessage(divName, content, showDiv) { 
    document.getElementById(divName).style.visibility = showDiv ? "visible" : "hidden";
    document.getElementById(divName).innerHTML = content; 
}