function initPage() {
	showBackToTopIcon();	
}

function showBackToTopIcon() {
	var back_icon = document.getElementById('backToTop');
	var content = document.getElementById('wrapper');
	var nasobic = 1.5;
	
	if( (content.offsetHeight) > (nasobic * screen.height)) {
		back_icon.style.display = "block";
	} else {
		back_icon.style.display = "none";
	}
}

function checkDateForm( d, m, y ) {
	return m > 0 && m < 13 && y > 0 && y < 32768 && d > 0 && d <= (new Date(y, m, 0)).getDate();
}