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此文章僅為轉寄，非原創，原文http://www.cnblogs.com/ayu999/p/5743324.html
請支援原創
先上一張簡約的介面的
這裡是style裡面的內容
<style> input[type]{ border: 1px solid darkorange; background: white; } #button{ border: 10px solid orange; width: 200px; box-shadow:0px 4px 5px #666; background: orange; color: white; } </style>
再來body裡面的內容,這裡用到的是失焦 onblur 和聚焦 onfocus
<body>
<center>
<div>
<form>
<h3>使用者註冊</h3>
<hr>
<p>使用者名稱:<input type="text" id="name" placeholder="請填寫使用者名稱" required="required" onblur="name1()" <!--onfocus="name2()-->"><br><span id="tel"></span></p>
<p>密碼:<input id="paswd" type="password" placeholder="請填寫密碼" onblur="pwd1()" required="required" onfocus="pwd2()"><br><span id="pw"></span></p>
<p>確認密碼:<input id="paswd2" type="password" placeholder="請確認密碼" required="required" onkeyup="validate()" ><br><span id="qpwtx"></span></p>
<p>郵箱:<input type="email" placeholder="請填寫郵箱" required="required"></p>
<p><input type="checkbox" required="required">我已閱讀註冊手冊</p>
<p><input type="submit" id="button" value="註冊"></p>
</form>
</div>
</center>
</body>
最後是js裡面的代碼
<script>
function name1(){
var name=document.getElementById("name").value;
if(name.length==""){
document.getElementById("tel").innerHTML="使用者名稱不可為空"
document.getElementById("tel").style.color="red";
}else{
document.getElementById("tel").innerHTML="√"
document.getElementById("tel").style.color="green";
}
}
//function name2(){
//document.getElementById("tel").innerHTML="請填寫使用者名稱"
//document.getElementById("tel").style.color="#999";
//}
function pwd2(){
document.getElementById("pw").innerHTML="請填寫6-12位的密碼"
document.getElementById("pw").style.color="#999";
}
function pwd1(){
p=document.getElementById("paswd").value;
if(p.length>=6&&p.length<=20)
{
document.getElementById("pw").innerHTML="√"
document.getElementById("pw").style.color="green";
}else{
document.getElementById("pw").innerHTML="格式錯誤,請輸入6-20位"
document.getElementById("pw").style.color="red";
}
}
function validate(){
var qpw=document.getElementById("paswd").value;
var qpw2=document.getElementById("paswd2").value;
if(qpw==qpw2 && p.length>=6&&p.length<=20){
document.getElementById("qpwtx").innerHTML="<font color=‘green‘>√</font>";
document.getElementById("button").disabled = false;
}
else {
document.getElementById("qpwtx").innerHTML="<font color=‘red‘>兩次密碼不相同或者格式錯誤</font>";
document.getElementById("button").disabled = true;
}
}
</script>
轉寄——html使用者註冊介面
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