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[英]I wish to show and hide 1 or 2 drop down menus from another drop down selection
[英]Show details from 3 drop down menus
我正在上大學的網站上有頁面,注冊頁面有問題。 我想打開一個新窗口,其中包含我輸入的詳細信息。 下面是給我的代碼,顯示了輸入到一個下拉菜單中的數據,但生日菜單有3個菜單,一個菜單用於日,月,年。 我需要幫助來從這3個下拉菜單中接收代碼,而不僅僅是一個。 謝謝你的幫助!
function getdropdownvalue()
{
var range = document.form1.DOBDay.selectedIndex
return document.form1.DOBDay.options[range].value
}
<body>
<form action="" method="post" name="form1" onsubmit="checkdetails()">
<table bgcolor="white" width="700" border="0" align="center">
<col width="200">
<col width="200">
<tr>
<th colspan = "2" align = "center" bgcolor="grey"> Fill the form to sign up. </th>
</tr>
<tr>
<td> </td>
</tr>
<tr>
<td colspan="2" style="font-size:12px">Fields marked with * are mandatory</td>
</tr>
<tr>
<td> </td>
</tr>
<tr>
<td>Name*</td>
<td>Surname*</td>
</tr>
<tr>
<td><label>
<input type="text" name="txtname" id="txtname" class="info" />
<td><label>
<input type="text" name="txtsurname" id="txtsurname" class="info" />
</label></td>
</tr>
<tr>
<td> Create Username*</td>
<td> Birthday</td>
</tr>
<tr>
<td><label>
<input type="text" name="txtusername" id="txtusername" class="info"/>
</label></td>
<td><select name="DOBMonth">
<option> Month </option>
<option value="January">January</option>
<option value="Febuary">Febuary</option>
<option value="March">March</option>
<option value="April">April</option>
<option value="May">May</option>
<option value="June">June</option>
<option value="July">July</option>
<option value="August">August</option>
<option value="September">September</option>
<option value="October">October</option>
<option value="November">November</option>
<option value="December">December</option>
</select>
<select name="DOBDay">
<option> Day </option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
<option value="6">6</option>
<option value="7">7</option>
<option value="8">8</option>
<option value="9">9</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="DOBYear">
<option> Year </option>
<option value="2016">2016</option>
<option value="2015">2015</option>
<option value="2014">2014</option>
<option value="2013">2013</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">1998</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>
<option value="1990">1990</option>
<option value="1989">1989</option>
<option value="1988">1988</option>
<option value="1987">1987</option>
<option value="1986">1986</option>
<option value="1985">1985</option>
<option value="1984">1984</option>
<option value="1983">1983</option>
<option value="1982">1982</option>
<option value="1981">1981</option>
<option value="1980">1980</option>
<option value="1979">1979</option>
<option value="1978">1978</option>
<option value="1977">1977</option>
<option value="1976">1976</option>
<option value="1975">1975</option>
<option value="1974">1974</option>
<option value="1973">1973</option>
<option value="1972">1972</option>
<option value="1971">1971</option>
<option value="1970">1970</option>
<option value="1969">1969</option>
<option value="1968">1968</option>
<option value="1967">1967</option>
<option value="1966">1966</option>
<option value="1965">1965</option>
<option value="1964">1964</option>
<option value="1963">1963</option>
<option value="1962">1962</option>
<option value="1961">1961</option>
<option value="1960">1960</option>
<option value="1959">1959</option>
<option value="1958">1958</option>
<option value="1957">1957</option>
<option value="1956">1956</option>
<option value="1955">1955</option>
<option value="1954">1954</option>
<option value="1953">1953</option>
<option value="1952">1952</option>
<option value="1951">1951</option>
<option value="1950">1950</option>
<option value="1949">1949</option>
<option value="1948">1948</option>
<option value="1947">1947</option>
</select>
<tr>
<td>Email*</td>
<td>Confirm Email*</td>
</tr>
<tr>
<td><label>
<input type="text" name="txtemail" id="txtemail" class="info" onchange="ValidateEmail(txtemail)" />
<td><label>
<input type="text" name="txtemail2" id="txtemail2" class="info" onchange="ValidateEmail2(txtemail2)"/>
</label></td>
</tr>
<tr>
<td>Password*</td>
<td>Confirm Pasword*</td>
</tr>
<tr>
<td><label>
<input type="password" name="txtpassword" id="txtpassword" class="info"/>
<td><label>
<input type="password" name="txtpassword2" id="txtpassword2" class="info"/>
</label></td>
</tr>
<td colspan="2" style="font-size:12px">**Passwords must be at least 8 characters in lenght.</td>
</tr>
<tr>
<td> </td>
</tr>
<tr>
<td colspan="2">
<label>
<input type="radio" name="terms" value="terms" id="terms" />
I agree to the Terms and Conditions</label>
</td></tr>
<br><br><br>
<tr>
<td colspan="2"><label>
<input type="radio" name="notify" value="notify" id="notify" />
I want to receive notifications by text/email about new products in stock.</label>
</td>
</tr>
<tr>
<td> </td>
</tr>
<tr>
<td><label>
<input type="submit" name="Login" id="Login" value="Login" onclick="checkdetails()" />
</label></td>
<td><label>
<input type="reset" name="Reset" id="Reset" value="Reset" />
</label></td>
</tr>
<tr>
<td> </td>
</tr>
</table>
</form>
在為您提供解決方案之前,我在您的代碼中注意到您缺少一些結束標記,填充了代碼中的下拉列表,使用表格進行格式化等。這些是一些建議:
id
添加到您的select
/ input
語句中,以便更輕松地使用JS。 <table>
格式化頁面。 這是一個簡單的代碼段:
function a() { var m = document.getElementById("DOBMonth"); var y = document.getElementById("DOBYear"); var d = document.getElementById("DOBDay"); alert(" D:"+d.options[d.selectedIndex].value+" M:"+m.options[m.selectedIndex].value+" Y:"+y.options[m.selectedIndex].value); }
<select name="DOBMonth" id="DOBMonth"> <option> Month </option> <option value="January">January</option> <option value="Febuary">Febuary</option> <option value="March">March</option> <option value="April">April</option> <option value="May">May</option> <option value="June">June</option> <option value="July">July</option> <option value="August">August</option> <option value="September">September</option> <option value="October">October</option> <option value="November">November</option> <option value="December">December</option> </select> <select name="DOBDay" id="DOBDay"> <option> Day </option> <option value="1">1</option> <option value="2">2</option> <option value="3">3</option> <option value="4">4</option> <option value="5">5</option> <option value="6">6</option> <option value="7">7</option> <option value="8">8</option> <option value="9">9</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="DOBYear" id="DOBYear"> <option> Year </option> <option value="2016">2016</option> <option value="2015">2015</option> <option value="2014">2014</option> <option value="2013">2013</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">1998</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> <option value="1990">1990</option> <option value="1989">1989</option> <option value="1988">1988</option> <option value="1987">1987</option> <option value="1986">1986</option> <option value="1985">1985</option> <option value="1984">1984</option> <option value="1983">1983</option> <option value="1982">1982</option> <option value="1981">1981</option> <option value="1980">1980</option> <option value="1979">1979</option> <option value="1978">1978</option> <option value="1977">1977</option> <option value="1976">1976</option> <option value="1975">1975</option> <option value="1974">1974</option> <option value="1973">1973</option> <option value="1972">1972</option> <option value="1971">1971</option> <option value="1970">1970</option> <option value="1969">1969</option> <option value="1968">1968</option> <option value="1967">1967</option> <option value="1966">1966</option> <option value="1965">1965</option> <option value="1964">1964</option> <option value="1963">1963</option> <option value="1962">1962</option> <option value="1961">1961</option> <option value="1960">1960</option> <option value="1959">1959</option> <option value="1958">1958</option> <option value="1957">1957</option> <option value="1956">1956</option> <option value="1955">1955</option> <option value="1954">1954</option> <option value="1953">1953</option> <option value="1952">1952</option> <option value="1951">1951</option> <option value="1950">1950</option> <option value="1949">1949</option> <option value="1948">1948</option> <option value="1947">1947</option> </select> <button onclick="a()">Click</button>
只需一一獲取所有需要的元素的值(因為您說要以數字格式表示月份和日期,所以我得到這些元素的索引而不是值)
function getdropdownvalue()
{
var month = document.form1.DOBMonth.selectedIndex;
var day = document.form1.DOBDay.selectedIndex;
var year = document.form1.DOBYear.options[document.form1.DOBDay.selectedIndex].value;
alert(month+' '+day+' '+year);
return month+' '+day+' '+year;
}
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