var tshirtprices = new Array();
tshirtprices[1]="0";
tshirtprices[2]="0";
tshirtprices[3]="0";
tshirtprices[4]="0";
tshirtprices[5]="1";
tshirtprices[6]="2";
var tshirtsizes = new Array();
tshirtsizes[1]="Small";
tshirtsizes[2]="Medium";
tshirtsizes[3]="Large";
tshirtsizes[4]="XLarge";
tshirtsizes[5]="XXLarge";
tshirtsizes[6]="XXXLarge";


function modifyprice(form){
origprice = form.theprice.value;
thesize = form.size.options[form.size.selectedIndex].value;
theprice = document.getElementById('pricedisplay');
theprice.innerHTML = parseFloat(tshirtprices[thesize])+parseFloat(origprice);
form.amount.value = parseFloat(tshirtprices[thesize])+parseFloat(origprice);
form.os0.value = tshirtsizes[thesize];
}