function updateAmount(p_sForm, p_sField, p_sAction){
	var oForm = document.getElementById(p_sForm);
	if(p_sAction == '+' && oForm[p_sField].value < 12){
		oForm[p_sField].value++;
	}else if(p_sAction == '-' && oForm[p_sField].value > 1){
		oForm[p_sField].value--;
	}
}

function slideOut(p_sElement){
	setTimeout("doSlideOut('" + p_sElement + "')", 2000);
}

function doSlideOut(p_sElement){
	var oElement = document.getElementById(p_sElement);

	if(oElement != null){
		oElement.style.height = (oElement.offsetHeight - 1) + "px";
		if(oElement.offsetHeight > 0){
			setTimeout("doSlideOut('" + p_sElement + "')", 25);
		}else{
			oElement.style.display = "none";
		}
	}
}