Javascript 单选按钮验证错误
对于下面验证功能中的性别单选按钮验证,只要未选择任何一个性别单选按钮,就会发出警报。但是,无论何时在浏览器中选择“确定”,都会提交表单。是什么导致了这个问题?如果可能的话,当返回false时,我也希望它能像其他的一样被聚焦 JavaScriptJavascript 单选按钮验证错误,javascript,html,validation,Javascript,Html,Validation,对于下面验证功能中的性别单选按钮验证,只要未选择任何一个性别单选按钮,就会发出警报。但是,无论何时在浏览器中选择“确定”,都会提交表单。是什么导致了这个问题?如果可能的话,当返回false时,我也希望它能像其他的一样被聚焦 JavaScript function validate() { var gender = document.getElementsByName("gender"); if( document.myForm.firstname.value == "" ) {
function validate()
{
var gender = document.getElementsByName("gender");
if( document.myForm.firstname.value == "" )
{
alert( "Please provide your first name!" );
document.myForm.firstname.focus() ;
return false;
}
if( document.myForm.lastname.value == "" )
{
alert( "Please provide your last name!" );
document.myForm.lastname.focus() ;
return false;
}
if( document.myForm.email.value == "" )
{
alert( "Please provide your email!" );
document.myForm.email.focus() ;
return false;
}
if( (gender[0].checked == false) && (gender[1].checked == false))
{
alert( "Please provide your gender!" );
document.myForm.male.focus() ;
return false;
}
if( document.myForm.date.value == "" )
{
alert( "Please provide a date to be performed!" );
document.myForm.date.focus() ;
return false;
}
if( document.myForm.vname.value == "" )
{
alert( "Please provide a victim's name!" );
document.myForm.vname.focus() ;
return false;
}
if( document.myForm.vemail.value == "" )
{
alert( "Please provide the victim's email!" );
document.myForm.vemail.focus() ;
return false;
}
return( true );
}
HTML:
真理
名字:
姓氏:
电子邮件:
男性
女性
执行日期:
受害者
名称:
电子邮件:
请在下面选择一个真理问题
你有没有摔倒并头着地过
你有没有归还过太多的零钱
你曾经住进过医院吗
你烤过蛋糕吗
你考试作弊过吗
你有没有想过你从未出生过
你曾经躲过主日学校吗
只需为性别提供默认值
这将避免任何可能的混淆,并且总体上需要更少的验证。您正在定义validate()函数,但我没有看到您在提交文档时实际调用它。提交输入本身不知道您的验证 可能会改变:
<input type="submit" value="Submit"/>
到
我会根据不同的ID进行选择,将它们命名为男性和女性,并按照ElPedro的建议调用验证函数。我已经找到了解决方案。而不是:
if( (gender[0].checked == false) && (gender[1].checked == false))
{
alert( "Please provide your gender!" );
document.myForm.male.focus() ;
return false;
}
应该是:
if( (gender[0].checked == false) && (gender[1].checked == false))
{
alert( "Please provide your gender!" );
document.myForm.male.focus() ;
return true;
}
我这样做了&验证工作非常完美。我认为这是焦点功能的问题。 我几乎没做什么改变,结果成功了
<div id="box">
<form action="/cgi-bin/test.cgi" name="myForm" onsubmit="return validate();">
<h1> Truth </h1>
<label> First Name: </label> <input type="text" name="firstname" id="firstname" maxlength="30" placeholder="John" /> <br><br>
<label> Last Name: </label> <input type="text" name="lastname" id="lastname" maxlength="30" placeholder="Doe" /> <br><br>
<label> Email:</label> <input type="text" name="email" id="email" placeholder="user@mydomain.com" /> <br><br>
<label> Male </label><input type="radio" name="gender" id="gender" value="male"/>
<label> Female </label><input type="radio" name="gender" id="gender" value="female"/> <br><br>
<label> Date to be performed: </label><input type="date" name="date" id="date" /><br><br>
<h2> Victim </h2>
<label> Name: </label> <input type="text" name="vname" id="vname" maxlength="30" placeholder="Mary Jane" /><br><br>
<label> Email:</label> <input type="text" name="vemail" id="vemail" placeholder="user@mydomain.com" /> <br><br>
<h2> Please select a truth questions below </h2> <br>
<input type="radio" name="truth" value="q1"> Have you ever fallen and landed on your head? <br>
<input type="radio" name="truth" value="q2"> Have you ever return too much change? <br>
<input type="radio" name="truth" value="q3"> Have you ever been admitted into the hospital? <br>
<input type="radio" name="truth" value="q4"> Have you ever baked a cake? <br>
<input type="radio" name="truth" value="q5"> Have you ever cheated on test? <br>
<input type="radio" name="truth" value="q6"> Did you ever wish you were never born? <br>
<input type="radio" name="truth" value="q7"> Did you ever hide from Sunday School? <br><br>
<input type="submit" value="Submit"/> <br>
</form>
</div>
<script>
function validate(e)
{
var gender = document.getElementsByName("gender");
if( document.myForm.firstname.value == "" )
{
alert( "Please provide your first name!" );
return false;
}
if( document.myForm.lastname.value == "" )
{
alert( "Please provide your last name!" );
return false;
}
if( document.myForm.email.value == "" )
{
alert( "Please provide your email!" );
return false;
}
if( (gender[0].checked == false) && (gender[1].checked == false))
{
alert( "Please provide your gender!" );
return false;
}
if( document.myForm.date.value == "" )
{
alert( "Please provide a date to be performed!" );
return false;
}
if( document.myForm.vname.value == "" )
{
alert( "Please provide a victim's name!" );
return false;
}
if( document.myForm.vemail.value == "" )
{
alert( "Please provide the victim's email!" );
return false;
}
return true;
}
</script>
真理
名字:
姓氏:
电子邮件:
男性
女性
执行日期:
受害者
名称:
电子邮件:
请在下面选择一个真理问题
你有没有摔倒并头着地过
你有没有归还过太多的零钱
你曾经住进过医院吗
你烤过蛋糕吗
你考试作弊过吗
你有没有想过你从未出生过
你曾经躲过主日学校吗
功能验证(e)
{
var-gender=document.getElementsByName(“性别”);
如果(document.myForm.firstname.value==“”)
{
提醒(“请提供您的名字!”);
返回false;
}
如果(document.myForm.lastname.value==“”)
{
提醒(“请提供您的姓氏!”);
返回false;
}
如果(document.myForm.email.value==“”)
{
提醒(“请提供您的电子邮件!”);
返回false;
}
if((性别[0]。选中==false)和&(性别[1]。选中==false))
{
提醒(“请提供您的性别!”);
返回false;
}
如果(document.myForm.date.value==“”)
{
警告(“请提供要执行的日期!”);
返回false;
}
如果(document.myForm.vname.value==“”)
{
警告(“请提供受害者的姓名!”);
返回false;
}
如果(document.myForm.vemail.value==“”)
{
提醒(“请提供受害者的电子邮件!”);
返回false;
}
返回true;
}
不知道答案是否正确,但我使用了这种方法,每次之后,我都按照自己的意愿传递变量值,并传递到表单:)
var-swticher=document.getElementById('swticher-on');
var swticher_off=document.getElementById('swticher-off');
功能检查(e){
如果(e.checked==swticher.checked)
{
//通过在其中设置valirable,可以将on的值设置为默认值
var val=swticher.value=“1”;
警报('on->'+val);
}
else if(e.checked==swticher\u off.checked)
{
//通过在其中设置valirable,可以将off的值设置为默认值
var val=swticher.value=“0”;
警报(“关闭->”+val);
}
}
在…上
关
你能用这个问题创建一个JSFIDLE吗?@Stefan提交对JSFIDLE不起作用。当你尝试提交时会出现什么错误?@misterManSam验证成功后,浏览器中的警报窗口会弹出并显示“请提供你的性别!”但之后,提交会通过并忽略其余的验证(即日期、受害者姓名等)@Stefan请参见上文^我被要求对所有字段进行验证。@DanielleStewart那么你不想信任javascript。这是应该在服务器端完成的事情。客户端javascript可以在浏览器中轻松修改。哦,不,这个任务是测试客户端验证。哦……这是家庭作业。在任何形式的pr中生产环境您永远不希望依赖客户端代码进行验证,因此,希望在客户端验证所有内容是一个简单的要求。如果您这样做,那么它们将被视为两组单选按钮。单选按钮选择的全部要点是,您可以在它们之间切换,并且为此它们必须具有名称相同。另外,您的焦点问题是因为您试图将焦点放在一个名为“mail”的控件上,该控件不存在。请将其更改为“焦点放在document.myForm.gender[0]上”
if( (gender[0].checked == false) && (gender[1].checked == false))
{
alert( "Please provide your gender!" );
document.myForm.male.focus() ;
return true;
}
<div id="box">
<form action="/cgi-bin/test.cgi" name="myForm" onsubmit="return validate();">
<h1> Truth </h1>
<label> First Name: </label> <input type="text" name="firstname" id="firstname" maxlength="30" placeholder="John" /> <br><br>
<label> Last Name: </label> <input type="text" name="lastname" id="lastname" maxlength="30" placeholder="Doe" /> <br><br>
<label> Email:</label> <input type="text" name="email" id="email" placeholder="user@mydomain.com" /> <br><br>
<label> Male </label><input type="radio" name="gender" id="gender" value="male"/>
<label> Female </label><input type="radio" name="gender" id="gender" value="female"/> <br><br>
<label> Date to be performed: </label><input type="date" name="date" id="date" /><br><br>
<h2> Victim </h2>
<label> Name: </label> <input type="text" name="vname" id="vname" maxlength="30" placeholder="Mary Jane" /><br><br>
<label> Email:</label> <input type="text" name="vemail" id="vemail" placeholder="user@mydomain.com" /> <br><br>
<h2> Please select a truth questions below </h2> <br>
<input type="radio" name="truth" value="q1"> Have you ever fallen and landed on your head? <br>
<input type="radio" name="truth" value="q2"> Have you ever return too much change? <br>
<input type="radio" name="truth" value="q3"> Have you ever been admitted into the hospital? <br>
<input type="radio" name="truth" value="q4"> Have you ever baked a cake? <br>
<input type="radio" name="truth" value="q5"> Have you ever cheated on test? <br>
<input type="radio" name="truth" value="q6"> Did you ever wish you were never born? <br>
<input type="radio" name="truth" value="q7"> Did you ever hide from Sunday School? <br><br>
<input type="submit" value="Submit"/> <br>
</form>
</div>
<script>
function validate(e)
{
var gender = document.getElementsByName("gender");
if( document.myForm.firstname.value == "" )
{
alert( "Please provide your first name!" );
return false;
}
if( document.myForm.lastname.value == "" )
{
alert( "Please provide your last name!" );
return false;
}
if( document.myForm.email.value == "" )
{
alert( "Please provide your email!" );
return false;
}
if( (gender[0].checked == false) && (gender[1].checked == false))
{
alert( "Please provide your gender!" );
return false;
}
if( document.myForm.date.value == "" )
{
alert( "Please provide a date to be performed!" );
return false;
}
if( document.myForm.vname.value == "" )
{
alert( "Please provide a victim's name!" );
return false;
}
if( document.myForm.vemail.value == "" )
{
alert( "Please provide the victim's email!" );
return false;
}
return true;
}
</script>