How can I make a field become mandatory if a box is ticked.

[plumba]

Hi

I have a user enolment form which is users fill out to let IT know that they need setting up on 'x' systems. When the user put a cross in the 'I would like Email' checkbox I would like the form to make two other text field become mandatory. If they dont request email (which is the defult) the boxes will not be mandatory.

Thanks in advance.....

[acoder]

Show the form HTML markup.

You will need to check for the checked property of the checkbox object. If it's checked, check that the two now mandatory fields have something in them by checking their values. If they don't, alert an error message.

[plumba]

Hi all

This is probably a simple request which shows my level of novice of expertise in this..

I have a simple html form.
There is a box on the form which asks for the users Email address. This field is not mandatory...
BUT if a user clicks a Check Box which says 'Send me an email' then I would like a script to run which would the make the Email address field become mandatory..
It's got to be a simple - "if 'X' is ticked make 'Y' mandatory" but i cant figure it out...

Thanks in advance...

[acoder]

Merged threads. Please do not double post.

[plumba]

Merged threads. Please do not double post.

Apologies - thought my second explaination was a bit clearer than the first! Even I coulnd't understand my first one! Still learning the ropes here...

[epots9]

Hi all

This is probably a simple request which shows my level of novice of expertise in this..

I have a simple html form.
There is a box on the form which asks for the users Email address. This field is not mandatory...
BUT if a user clicks a Check Box which says 'Send me an email' then I would like a script to run which would the make the Email address field become mandatory..
It's got to be a simple - "if 'X' is ticked make 'Y' mandatory" but i cant figure it out...

Thanks in advance...

please post your code so we can see the error.

thank you

[plumba]

please post your code so we can see the error.

thank you

I dont really have an error as such, I dont know where to begin :/

It just a really simple form which I want to add a checkbox/radio button which will call a script to make another field mandatory.

Could say, I'll be starting from scratch. If I could get just an example of how to get one box make another mandatory I should be able to take it from there. If sample code is needed I could knock summit up, but it's basically a blank sheet at the moment.

Cheers

[epots9]

code for checkbox
[html]
<form id="form1" name="form1">
<input type="text" id="email" name="email" />
<input type="checkbox" id="emailMe" name="emailMe" />
<input type="button" id="submit" name="submit" value="Submit" onclick="process();" />
</form>
[/html]

function process()
{
if(document.getElementById("emailMe").checked && document.getElementById("email").value == "")
{
//do something to tell the person to enter email
}
else
{
//do something when everything is ok
}
}
 

u'll have to make some changes to make it work with your code.

good luck

[plumba]

code for checkbox
[html]
<form id="form1" name="form1">
<input type="text" id="email" name="email" />
<input type="checkbox" id="emailMe" name="emailMe" />
<input type="button" id="submit" name="submit" value="Submit" onclick="process();" />
</form>
[/html]

function process()
{
if(document.getElementById("emailMe").checked && document.getElementById("email").value == "")
{
//do something to tell the person to enter email
}
else
{
//do something when everything is ok
}
}
 

u'll have to make some changes to make it work with your code.

good luck

Works a TREAT thank you..
Only one more question....
The If Then Else statement, I want to get it to alert then stop the submit going ahead. I've got:

function process()
{
if(document.getElementById("emailMe").checked && document.getElementById("Job_TitleW").value == "")
{
alert("To process Email enrolment you MUST provide the Welsh Job title. Please add then Click Submit")
return false
//do something to tell the person to enter email
}
else
{
//do something when everything is ok
}
}

But this doesn't seem to stop the code running...

[epots9]

based on the code i gave u...the form will never submit cuz i never designed it to. is your form submitting?

document.getElementById("form1").submit();
 

that will submit the form using javascript, must be placed in the else statement.

alittle reading about forms

[plumba]

based on the code i gave u...the form will never submit cuz i never designed it to. is your form submitting?

document.getElementById("form1").submit();
 

that will submit the form using javascript, must be placed in the else statement.

alittle reading about forms

Nope realised that, but I tied it into my form which submits this way:
<form method="post" action="mailto:[e-mail]?subject....... etc etc

Just need the Java to say if this statement is not met then STOP the whole lot.

[acoder]

Nope realised that, but I tied it into my form which submits this way:
<form method="post" action="mailto:[e-mail]?subject....... etc etc

Just need the Java to say if this statement is not met then STOP the whole lot.

Call the validation function onsubmit:

onsubmit="return process();"