function yesno(message) {
  var Check = confirm(message);
 	if(Check == true) 
  	return true;
	else
 		return false;
} //function yesno(message)

function CtrlCheckbox() {
	var mySelect = document.getElementById('layer');
	if (mySelect.value == 'GW') {
		document.getElementById('cbxbss').style.display = 'block';
		document.getElementById('lblbss').style.display = 'block';
		document.getElementById('cbxsis').style.display = 'none';
		document.getElementById('lblsis').style.display = 'none';
	}
	else if (mySelect.value == 'HW') {
		document.getElementById('cbxbss').style.display = 'none';
		document.getElementById('lblbss').style.display = 'none';
		document.getElementById('cbxsis').style.display = 'block';
		document.getElementById('lblsis').style.display = 'block';
	}
	else {
		document.getElementById('cbxbss').style.display = 'none';
		document.getElementById('lblbss').style.display = 'none';
		document.getElementById('cbxsis').style.display = 'none';
		document.getElementById('lblsis').style.display = 'none';
	} 
} //function CtrlCheckbox()