function jumpTo (path, confirmMessage) {
	var answer = confirm(confirmMessage);
	if (answer == 1) { location.href = path };
}

function goback () {
	history.go(-1);
}

function popup(url, width, height) {
	var x = (screen.width/2)-(width/2);
	var y = (screen.height/2)-(height/2);
	window.open(url, 'popup', 'width=400,height=500,location=0,toolbar=0,status=0,menubar=0,scrollbars=1,resizable=0,left='+x+',top='+y+'');
}