formvalidation on a checkbox

[nescio]

hello,

i have a form, that contains only 5 checkboxes, named box[1], box[2] etc.
there are no other textfields than this five checkboxes;

people have to check at least one checkbox;

i want to do a form validation but it does not work;
this code normaly works on textfields without a problem.

here is the javascript source code i tried:

---------------------- source
code ---------------------------------------------
function formMaakCSV(hetForm){
if (hetForm.box[1].value='' || hetForm.box[2].value=''||
hetForm.box[3].value=''|| hetForm.box[4].value=''||
hetForm.box[5].value=''){
alert("U moet minimaal een checkbox invullen");
return (false);
}

return (true);
}

----------------------------------------------------------------------------
----

thanks

[Gomolyako Eduard]

nescio пи�ал(а):

hello,

i have a form, that contains only 5 checkboxes, named box[1], box[2] etc.
there are no other textfields than this five checkboxes;

people have to check at least one checkbox;

i want to do a form validation but it does not work;
this code normaly works on textfields without a problem.

here is the javascript source code i tried:

---------------------- source
code ---------------------------------------------
function formMaakCSV(hetForm){
if (hetForm.box[1].value='' || hetForm.box[2].value=''||
hetForm.box[3].value=''|| hetForm.box[4].value=''||
hetForm.box[5].value=''){
alert("U moet minimaal een checkbox invullen");
return (false);
}

return (true);
}

----------------------------------------------------------------------------
----

thanks

Try to validate by "checked" property of checkboxes.

Best, Ed.

[Zwerfkat]

"nescio" <ne****@nescio.nes> wrote in message news:43**********************@nova.planet.nl...

hello,

i have a form, that contains only 5 checkboxes, named box[1], box[2] etc.
there are no other textfields than this five checkboxes;

people have to check at least one checkbox;

i want to do a form validation but it does not work;
this code normaly works on textfields without a problem.

here is the javascript source code i tried:

---------------------- source
code ---------------------------------------------
function formMaakCSV(hetForm){
if (hetForm.box[1].value='' || hetForm.box[2].value=''||
hetForm.box[3].value=''|| hetForm.box[4].value=''||
hetForm.box[5].value=''){
alert("U moet minimaal een checkbox invullen");
return (false);
}

return (true);
}

Probably you have to use the array indexes 0..4 instead of 1..5.

Or use the following code which works for every amount of check boxes:

function formMaakCSV(hetForm){
for(i=0;i<hetForm.box.length;i++)
if(hetForm.box[i].value != '') return (true);
alert("U moet minimaal een checkbox invullen");
return (false);
}

// Groeten uit Soest!

[nescio]

it is working now,

thanks for your help

[Dr John Stockton]

JRS: In article <43**********************@nova.planet.nl>, dated Fri,
28 Oct 2005 13:38:22, seen in news:comp.lang.javascript, nescio
<ne****@nescio.nes> posted :

i have a form, that contains only 5 checkboxes, named box[1], box[2] etc.
there are no other textfields than this five checkboxes;
people have to check at least one checkbox; function formMaakCSV(hetForm){
if (hetForm.box[1].value='' || hetForm.box[2].value=''||
hetForm.box[3].value=''|| hetForm.box[4].value=''||
hetForm.box[5].value=''){
alert("U moet minimaal een checkbox invullen");
return (false);
}

return (true);
}

Consider

function formMaakCSV(hetForm) { var X = 0
for (var J=0 ; J<5 ; J++) X += + hetForm.box[J].checked
if (!X) alert("U moet minimaal een checkbox invullen")
return !!X }

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