If that is a concern for you, then I would suggest that you try these modifications…
on line #149 remove onclick=“myFunction1()”
on line #454 remove onclick=“activateGPS();”
remove this…
<script>
function activateGPS() {
var adms = document.getElementById("system-adms")
adms.className="inactive"
}
</script>
<script>
/* When the user clicks on the button,
toggle between hiding and showing the dropdown content */
function myFunction1() {
document.getElementById("myDropdown-1").classList.toggle("show");
}
</script>
add this…
<script>
(function( d ) {
'use strict';
d.getElementById( 'shape5-31' ).addEventListener( 'click',
function() {
var adms = d.getElementById( 'system-adms' ), cls;
if ( adms.classList ) {
adms.classList.add( 'inactive' );
}
else {
cls = adms.getAttribute( 'class' );
adms.setAttribute( 'class', cls + ' inactive' );
}
}, false );
/*
When the user clicks on the button,
toggle between hiding and showing the dropdown content
*/
d.querySelector('.dropbtn' ).addEventListener( 'click',
function() {
d.getElementById( 'myDropdown-1' ).classList.toggle( 'show' );
}, false );
}( document ));
</script>
Note
Javascript is definitely not my forte, so the gurus here,
may have a better solution for the IE11 problem.