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Javascript密碼驗證不會工作

2016-04-22 92 views
0

所以即時嘗試完成我的註冊網站，並需要像任何其他網站的兩個密碼。我的驗證不會工作。理想情況下，我想要的是在更改第二個密碼時說明它們不相同或在它們繼續時繼續提醒。當我在password2輸入上輸入onchange =「checkpass（）」時，我認爲這個函數會起作用，但沒有任何反應。Javascript密碼驗證不會工作

function checkpass(pass1,pass2) 
{ 
    pass1=document.txtpassword.value 
    pass2=document.txtpassword2.value 

    if (pass1 != pass2) 
    { 
    alert ("Passwords must match") 
    } 
} 
<form action="Home.html" method="post" name="form1" onsubmit="Display()"> 
    <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>&nbsp;</td> 
    </tr> 


    <tr> 
     <td>Forename</td> 
     <td>Surname</td> 
    </tr> 


    <tr> 
     <td><label> 
     <input type="text" name="txtname" id="txtname" class="info" required> 
     <td><label> 
     <input type="text" name="txtsurname" id="txtsurname" class="info" required /> 
     </label></td> 
    </tr> 

    <tr> 
    <td> Create Username</td> 
    <td> Birthday</td> 
    </tr> 

    <tr> 
    <td><label> 
    <input type="text" name="txtusername" id="txtusername" class="info" required/> 
    </label></td> 




    <td><select name="DOBMonth" required> 
<option value=""> 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" required> 
    <option value=""> 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" required> 
    <option value=""> 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)" required /> 
     <td><label> 
     <input type="text" name="txtemail2" id="txtemail2" class="info" onchange="ValidateEmail2(txtemail2)" required/> 
     </label></td> 
    </tr> 


    <tr> 
     <td>Password</td> 
     <td>Confirm Pasword</td> 
    </tr> 


    <tr> 
     <td><label> 
     <input type="password" name="txtpassword" id="txtpassword" class="info" required/> 
     <td><label> 
     <input type="password" name="txtpassword2" id="txtpassword2" class="info" required/ onchange="checkpass(txtpassword,txtpassword2)"> 
     </label></td> 
    </tr> 


    <td colspan="2" style="font-size:12px">**Passwords must be at least 8 characters in length.</td> 
    </tr> 

    <tr> 
    <td>&nbsp;</td> 
    </tr> 


     <tr> 
     <td colspan="2"> 
     <label> 
      <input type="checkbox" name="terms" value="terms" id="terms" required/> 
      I agree to the Terms and Conditions</label> 
     </td></tr> 
     <br><br><br> 
     <tr> 
     <td colspan="2"><label> 
      <input type="checkbox" name="notify" value="notify" id="notify" /> 
      I want to receive notifications by text/email about new products in stock.</label> 
      </td> 
    </tr> 


    <tr> 
    <td>&nbsp;</td> 
    </tr> 

    <tr> 
    <td><label> 
     <input type="submit" name="Login" id="Login" value="Login"/> 
    </label></td> 
    <td><label> 
     <input type="reset" name="Reset" id="Reset" value="Reset" /> 
    </label></td> 
    </tr> 

    <tr> 
    <td>&nbsp;</td> 
    </tr> 
    </table> 
</form>

來源

2016-04-22 Shauna Goodman Fitzpatrick

+1

你檢查錯誤控制檯？ –

+0

您錯過了其中3個';' –

+0

我不知道從哪裏來 –

回答

0

在你checkPass功能，這些對象都是不確定的：

document.txtpassword 
document.txtpassword2

當你的功能運行時，不確定的對象將導致錯誤，這將在控制檯報告。但是，從用戶界面的角度來看，它似乎沒有任何事情發生。試試這個：

pass1=document.getElementById("txtpassword").value; 
pass2=document.getElementById("txtpassword2").value;

欲瞭解更多有關getElementById：https://developer.mozilla.org/en-US/docs/Web/API/Document/getElementById

來源

2016-04-23 00:32:18 jscn

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