function layoutwindow(url) {
	window.open (url, "mywindow","status=1,toolbar=1,width=350,height=350");
	return false;
}

/*shop member and vip price*/
function discount(price, discount)
{
	new_price = price - ((price * discount)/100);
	return new_price;
}

/*fill member and vip price field automatically*/
function auto_price()
{
	var price   = document.getElementById('price');
	var m_price = document.getElementById('member_price');
	var v_price = document.getElementById('vip_price');
	var m_procent = document.getElementById('member_procent');
	var v_procent = document.getElementById('vip_procent');

	if(m_procent.value != '0')
	{
		m_price.value = discount(price.value, m_procent.value);		
	}
	else
	{
		m_price.value = price.value;
	}

	if(v_procent.value != '0')
	{
		v_price.value = discount(price.value, v_procent.value);
	}
	else
	{	
		v_price.value = price.value;
	}
}

/*change price discount*/
function discount_price(name, value)
{
	n_name = name.replace('procent', 'price');
	var old_price = document.getElementById('price');

	if(old_price.value > '0')
	{	
		document.getElementById(n_name).value = discount(old_price.value, value);
	}
}