br>";
		}
		function isHttpServer() {
			let index = window.location.href.indexOf(".cgi");
			return (index<0);
		}
		function changeVisible(id, show, blockOrInline="inline") {
			x = document.getElementById(id);
			if (x) {
				if (show)
					x.style.display = blockOrInline;
				else
					x.style.display = "none";
			}
		}		
		function checkOptions() {
			let backend = document.forms[0]["backend"].value;
			let report = document.forms[0]["report"].value;
			let imgfs = document.getElementById("fsimg");
			