2個問題。我正在學習JavaScript中的表單驗證/ jQueryjQuery表單驗證顏色變化?
1)正如你可以看到當沒有輸入時,背景顏色是粉紅色的,但是當我開始輸入背景顏色不會消失。我嘗試過,如果'刪除班級'仍然沒有好處。我想用jQuery實現這一點
2)(html)當我點擊註冊時,我希望文檔頁面轉到不同的html頁面。我如何實現這一目標?
$(document).ready(function(){
\t if($("#fnameid,#Lnameid,#emailid,#phoneid,#dob-day,#dob-month,#dob-year,#mf").val(null)){
\t \t $("#fnameid,#Lnameid,#emailid,#phoneid,#dob-day,#dob-month,#dob-year,#mf").addClass("bordercoloron");
\t }
});
#wraper {
\t margin: 0 auto;
\t height: 4000px;
\t width: 1000px;
\t border: 2px solid black;
}
#wholeform {
\t margin: 0 auto;
\t height: 600px;
\t width: 400px;
\t border: 2px solid grey;
}
#fnameid, #Lnameid {
\t height: 50px;
\t width: 172px;
\t border: none;
\t position: relative;
\t left: 0.5%;
\t margin-top: 3%;
\t padding-left: 5%;
\t font-size: 20px;
}
#emailid, #phoneid {
\t height: 50px;
\t width: 372px;
\t border: none;
\t position: relative;
\t left: 0.5%;
\t font-size: 20px;
\t padding-left: 5%;
\t letter-spacing: 9px;
\t margin-top: 5%;
}
#dob-day, #dob-month, #dob-year {
\t height: 50px;
\t width: 120px;
\t position: relative;
\t left: 4%;
\t border: none;
\t font-size: 20px;
\t margin-top: 5%;
\t color: darkgray
}
#mf {
\t height: 55px;
\t width: 350px;
\t position: relative;
\t left: 4%;
\t border: none;
\t font-size: 50px;
\t margin-top: -2%;
\t padding-left: 5%;
\t letter-spacing: 10px;
\t color: darkgray
}
.bordercoloron {
\t background-color: coral;
}
.bordercoloroff {
\t border: none;
}
<!DOCTYPE html>
<html>
<head>
<script src="https://code.jquery.com/jquery-3.1.1.js" integrity="sha256-16cdPddA6VdVInumRGo6IbivbERE8p7CQR3HzTBuELA=" crossorigin="anonymous"></script>
<title></title>
<link rel="stylesheet" type="text/css" href="../css/jexercise.css">
</head>
<body>
<div id="wrap">
<div id="mainbox">
<form id="wholeform">
<input type="text" placeholder="FirstName" name="fname" id="fnameid">
<input type="text" placeholder="LastName" name="Lname" id="Lnameid">
<input type="text" placeholder="[email protected]" name="email" id="emailid">
<input type="text" placeholder="Mobile Phone Number" name="fname" id="phoneid">
<select name="dob-day" id="dob-day">
<option value="">Day</option>
<option value="">---</option>
<option value="01">01</option>
<option value="02">02</option>
<option value="03">03</option>
<option value="04">04</option>
<option value="05">05</option>
<option value="06">06</option>
<option value="07">07</option>
<option value="08">08</option>
<option value="09">09</option>
<option value="10">10</option>
<option value="11">11</option>
<option value="12">12</option>
<option value="13">13</option>
<option value="14">14</option>
<option value="15">15</option>
<option value="16">16</option>
<option value="17">17</option>
<option value="18">18</option>
<option value="19">19</option>
<option value="20">20</option>
<option value="21">21</option>
<option value="22">22</option>
<option value="23">23</option>
<option value="24">24</option>
<option value="25">25</option>
<option value="26">26</option>
<option value="27">27</option>
<option value="28">28</option>
<option value="29">29</option>
<option value="30">30</option>
<option value="31">31</option>
</select>
<select name="dob-month" id="dob-month">
<option value="">Month</option>
<option value="">-----</option>
<option value="01">January</option>
<option value="02">February</option>
<option value="03">March</option>
<option value="04">April</option>
<option value="05">May</option>
<option value="06">June</option>
<option value="07">July</option>
<option value="08">August</option>
<option value="09">September</option>
<option value="10">October</option>
<option value="11">November</option>
<option value="12">December</option>
</select>
<select name="dob-year" id="dob-year">
<option value="">Year</option>
<option value="">----</option>
<option value="2012">2012</option>
<option value="2011">2011</option>
<option value="2010">2010</option>
<option value="2009">2009</option>
<option value="2008">2008</option>
<option value="2007">2007</option>
<option value="2006">2006</option>
<option value="2005">2005</option>
<option value="2004">2004</option>
<option value="2003">2003</option>
<option value="2002">2002</option>
<option value="2001">2001</option>
<option value="2000">2000</option>
<option value="1999">1999</option>
<option value="1998">1998</option>
<option value="1997">1997</option>
<option value="1996">1996</option>
<option value="1995">1995</option>
<option value="1994">1994</option>
<option value="1993">1993</option>
<option value="1992">1992</option>
<option value="1991">1991</option>
</select>
<h3 style="font-size:20px; position: relative; left:5%; width:70px;color:darkgray;">Gender:</h3>
<select id="mf">
<option>Male</option>
<option>Female</option>
</select>
<input type="button" id="submit" style="background-color:#2196F3;border-radius:5px;border:2px #2196F3;position:relative; margin-top:25%;left:25%;width:200px;height:80px;font-size:50px;color:darkgray; padding-left:5%;" value="SignUp">
</form>
</div>
</div>
<script src="../js/jexercise.js"></script>
</body>
</html>
這是什麼意思'$('#fnameid,...').val(null)'? –
所有這些都是輸入標籤。所以如果沒有文本(空),顏色應該在文本沒有顏色的情況下 –
鏈接如何使用val()方法:http://api.jquery.com/val/在繼續下一步之前,您可以閱讀它 –