function ValidateForm(form)
{

var price = 0;
var period = 0;
var periodtime = 'M';
var nonsubscription = false;

switch(form.item_number.value)
{
/*case '1': 
price = 24.99;
period = 1;
break;
case '2': price = 39.99;
period = 3;
break;
case '3': price = 64.99;
period = 6;
break;
case '4': price = 99.99;
period = 1;
periodtime = 'Y';
break;
case '9':
nonsubscription=true;
price=199.99;
break;
case '10':
nonsubscription=true;
price=299.99;
break;
case '11':
nonsubscription=true;
price=399.99;
break;
case '12':
nonsubscription=true;
price=499.99;
break;*/
case '13':
    nonsubscription = true;
    price = 390.00;
    break;
case '14':
    nonsubscription = true;
    price = 590.00;
    break;
case '15':
    nonsubscription = true;
    price = 990.00;
    break;
case '16':
    nonsubscription = true;
    price = 1690.00;
    break;
}

if(nonsubscription)
{
    form.amount.value= price;
    form.item_name.value = form.item_number.options[form.item_number.selectedIndex ].text.split("$")[0];
}
else
{
    form.a3.value = Math.round(form.custom.value * price * 100)/100;

    form.p3.value = period;
    form.t3.value = periodtime;

    form.item_name.value = form.item_number.options[form.item_number.selectedIndex ].text + ' ('+ form.custom.value +' Computers)';
}
 
return true;
 
}