I have a webpage with an iframe which contains two checkboxes - one for yes, one for no.
What I'm trying to do is check if one of the checkboxes is ticked, and if so, display an alert.
I have tried various methods including plain JS and JQuery such as
function validate(){
var frame = document.getElementById('iFrame1');
var checkboxes = frame.contentWindow.document.getElementsById('element_0_0');
if (checkboxes.checked){
alert("Testing");
};
}
When I click the button which calls this function, nothing happens. I put an alert at the beginning which did show, but this main bit of code doesn't seem to do anything.
How can I get this value out from the iframe, please? The checkboxes have different IDs but the same name of 'element_0[]' (the iframe is from a 3rd party source and I can't change it unfortunately).
