I want to hide/visible a form based on checkbox in google webapp. If the checkbox is in checked condition then the form will be in visible else it should in hidden. I want to try with below mentioned code block. But not happen.
if (document.getElementById("df1").checked) {
document.getElementById("co").style.visibility = "hidden";
} else {
document.getElementById("co").style.visibility = "visible";
}<form id="co" style="visibility : hidden">
<br>
<label type="text">Name </label><input type="text">
<br>
<label type="text">Roll No. </label><input type="number" value="0" min="0">
<br><br>
<input type="submit" value="submit">
<input type="checkbox" id="df1">