function goTo(url) {
	window.location = url;
}

function verzendOptie() {
	document.getElementById("div_ophalen").style.display = "none";
	document.getElementById("div_verzenden").style.display = "block";
}

function ophaalOptie() {
	document.getElementById("div_verzenden").style.display = "none";
	document.getElementById("div_ophalen").style.display = "block";
}

var begin_cost = -1.00;

function changeShipCost(value) {	
	var cost = document.getElementById("ship_cost").innerHTML;
	var cost_num = parseFloat(cost);
	
	if(begin_cost == -1.00) {
		begin_cost = cost_num;
	}
	
	if(value == "Rembours") {
		if(begin_cost == 0.00) {
			new_cost = begin_cost + 11.00;
		}
		else {
			new_cost = begin_cost + 6.00;
		}
	}
	else if(value == "Ideal") {
		new_cost = begin_cost;
	}
	else {
		if(begin_cost == 0.00) {
			new_cost = begin_cost + 6.00;
		}
		else {
			new_cost = begin_cost;
		}
	}
	
	document.getElementById("ship_cost").innerHTML = "" + new_cost.toFixed(2);
	
	// total price
	var total = document.getElementById("sub_cost").innerHTML;
	var total_num = parseFloat(total);

	total_num = total_num + new_cost;
	
	document.getElementById("total_cost").innerHTML = "" + total_num.toFixed(2);

}