Event.observe(window, 'load', pagetopEffect, false);

function pagetopEffect() {
	var boxNodes = document.getElementsByClassName('pageTop');
	for (var i = 0, len = boxNodes.length; i < len; i++) {
		var btnNode = boxNodes[i].getElementsByTagName('A')[0];
		if (btnNode) {
			btnNode.removeAttribute('href');
			btnNode.onclick = function() {
				new Effect.ScrollTo('header', {duration: 0.7});
			}
		}
	}
}