function printpage(){
	window.print()
}

function showmenu(elmnt) {
	document.getElementById(elmnt).style.visibility="visible";
}
function hidemenu(elmnt) {
	document.getElementById(elmnt).style.visibility="hidden";
}

function selectall() {
	var cnt = 0;
	var elem = window.document.sok2.elements;
	cnt = elem.length;
	for (var i=0; i < cnt; i++) elem[i].checked = true;
}

function deselectall() {
	var cnt = 0;
	var elem = window.document.sok2.elements;
	cnt = elem.length;
	for (var i=0; i < cnt; i++) elem[i].checked = false;
}
function selectrange() {
	var inrange = false;
	var cnt = 0;
	var elem = window.document.sok2.elements;
	cnt = elem.length;
	for (var i=0; i < cnt; i++) {
		if (elem[i].type == 'checkbox') {
			if (elem[i].checked == true) {
				if (!inrange) inrange = true;
				else inrange = false;
			}
			if (inrange) elem[i].checked = true;
		}
	}
}