startPrice = parseFloat(startPriceString.replace(",","."),10)

function changePrice(){
  price = startPrice;
	
	for(i=0;i<opties.length;i++){
	  for(j=0;j<optiesSelect[i].length;j++){
	    if(document.getElementById(opties[i]).value == optiesSelect[i][j][0]){
			  price += parseFloat(optiesSelect[i][j][1].replace(",","."),10)
		price = Math.round(price*100)/100
		  }
		}
  }
	if(parseInt(price,10) == price)
	  priceString = price+",="
	else if(parseInt(price*10,10) == price*10)
	  priceString = price + "0"
	else
	  priceString = price + ""
  document.getElementById("prijs").innerHTML = priceString.replace(".",",")
}
window.onload = changePrice