function doCalc(){
	 var amount_refill = document.forms["cheque"].refill.options[document.forms["cheque"].refill.selectedIndex].value
	 var amount_treatment = document.forms["cheque"].treatment.options[document.forms["cheque"].treatment.selectedIndex].value
     var price_total = document.forms["cheque"].price;

	 var price = (amount_refill*29.95) + (amount_treatment*59.95) + 9.95;
	 price_total.value =  price.toFixed(2)

     }