var _pet = null

function initPet()
{
		if (window.pageYOffset) {  
 			scrollTop = window.pageYOffset;
		} else if(document.documentElement && document.documentElement.scrollTop){ 
 			scrollTop = document.documentElement.scrollTop; 
		} else if(document.body){ 
 			scrollTop = document.body.scrollTop; 
		} 
		_pet._parent = _pet.parentNode.parentNode.offsetHeight - 83;
		if (scrollTop < (_pet._parent - _pet._height - 20))		
		{
			_pet._top = scrollTop;
			_pet.fx.start(_pet._top);
			//_pet.style.marginTop = _pet._top + "px";
		}
		else
		{
			_pet._top = _pet._parent - _pet._height - 20;
			//_pet.style.marginTop = _pet._parent - _pet._height - 12 + "px";
			_pet.fx.start(_pet._top);
		}
}

function initPage() {
	_pet = document.getElementById("pet");
	_pet.fx = new Fx.Style(_pet, "margin-top", {duration:200, wait: false});
	if (_pet)
	{
		_pet._top = 0;
		_pet._height = _pet.offsetHeight;
		initPet();
		window.onscroll = initPet;
	}
}

if (window.addEventListener) {
	window.addEventListener("load", initPage, false);
}
else if (window.attachEvent)  {
	window.attachEvent("onload", initPage);
}