function changeprice1(which){switch (which) {case '5ml ': document.forms.paypal1.elements.amount.value='7.95';document.getElementById("pricediv1").innerHTML = '£7.95'; break; } }Harka-Mectin 5mlHarka-Mectin (active ingredient ivermectin) is for the treatment of worms, feather lice and mites. It is safe and easy-to-use. Only two drops per pigeon and one for cage birds are needed. Harka-Mectin is applied under the feathers between the shoulders. £7.95Quantity: 12345678910Options: Please select ...5ml function changeprice2(which){switch (which) {case '100ml': document.forms.paypal2.elements.amount.value='6.50';document.getElementById("pricediv2").innerHTML = '£6.50'; break; } }Harka-Verm 100mlHarka-Verm is for use against roundworm and hairworm.  Safe and easy-to-use.  Dosage: 6ml to 2lt of drinking water for 3 days.  Contains: levamisole.  Safe to use on caged birds (dilution may need to be adjusted for use with caged birds). £6.50Quantity: 12345678910Options: Please select ...100ml function changeprice3(which){switch (which) {case '750g': document.forms.paypal3.elements.amount.value='21.50';document.getElementById("pricediv3").innerHTML = '£21.50'; break;case '1.5kg': document.forms.paypal3.elements.amount.value='38.99';document.getElementById("pricediv3").innerHTML = '£38.99'; break;case '4kg': document.forms.paypal3.elements.amount.value='81.50';document.getElementById("pricediv3").innerHTML = '£81.50'; break;case '8kg': document.forms.paypal3.elements.amount.value='144.00';document.getElementById("pricediv3").innerHTML = '£144.00'; break; } }Verm - X Pellets for PoultryVerm-X is a 100% natural herbal formula and there is no egg withdrawal period - Verm-X is easy to use by adding to your bird's feed for 3 consecutive days each month. A further advantage of Verm-X over chemical based products is that if you are growing your birds for your dinner table there is no withdrawal period after using Verm-X prior to eating.  750g  will treat  10 birds for aprox 10 months  1.5kg will treat  20 birds for aprox 10 months  4kg will treat  75 birds for aprox 7 months  8kg will treat  150 birds  for aprox 7 monthsWe will contact you with the P & P for this product £21.50 (+ postage: £4.30)Quantity: 12345678910Options: Please select ...750g1.5kg4kg8kg function changeprice4(which){switch (which) {case '250ml': document.forms.paypal4.elements.amount.value='14.98';document.getElementById("pricediv4").innerHTML = '£14.98'; break;case '500ml': document.forms.paypal4.elements.amount.value='24.98';document.getElementById("pricediv4").innerHTML = '£24.98'; break;case '1 litre': document.forms.paypal4.elements.amount.value='42.99';document.getElementById("pricediv4").innerHTML = '£42.99'; break;case '5 litre': document.forms.paypal4.elements.amount.value='206.00';document.getElementById("pricediv4").innerHTML = '£206.00'; break;case '10 litre': document.forms.paypal4.elements.amount.value='379.99';document.getElementById("pricediv4").innerHTML = '£379.99'; break; } }Verm - X Liquid for PoultryVerm-X is 100% natural herbal formula and there is no egg withdrawal period - Verm-X liquid is easy to use by adding to your bird's drinking water and disallowing any other drinking water for the 3 days per month you add Verm-X. A further advantage of Verm-X over chemical based products is that if you are growing your birds for your dinner table there is no withdrawal period after using Verm-X prior to eating.  250ml will treat  10 birds for aprox 6 months 29p per bird every 4 weeks  500ml will treat  20 birds for aprox 6 months 24p per bird every 4 weeks  1 litre will treat  30 birds for aprox 6 months 21p per bird every 4 weeksWe will contact you with the P & P for this product£14.98Quantity: 12345678910Options: Please select ...250ml500ml1 litre5 litre10 litre