function validateForm(purchase)
{

if(isNaN(document.forms.purchase.amount.value) || document.forms.purchase.amount.value=="")
{
alert("Please enter the amount - please only use numbers.");
document.forms.purchase.amount.focus();
return false;
}
if(document.forms.purchase.DonorsFirstname.value=="")
{
alert("Please enter your first name.");
document.forms.purchase.DonorsFirstname.focus();
return false;
}
if(document.forms.purchase.DonorsLastname.value=="")
{
alert("Please enter your last name.");
document.forms.purchase.DonorsLastname.focus();
return false;
}
if(document.forms.purchase.DonorsEmail.value=="")
{
alert("Please enter your email address.");
document.forms.purchase.DonorsEmail.focus();
return false;
}
if(document.forms.purchase.DonorsAddress1.value=="")
{
alert("Please enter your address.");
document.forms.purchase.DonorsAddress1.focus();
return false;
}
if(document.forms.purchase.DonorsAddress4.value=="")
{
alert("Please enter your city.");
document.forms.purchase.DonorsAddress4.focus();
return false;
}
if(document.forms.purchase.DonorsAddress6.value=="")
{
alert("Please enter your postal code.");
document.forms.purchase.DonorsAddress6.focus();
return false;
}
if(document.forms.purchase.DonorsTel.value=="")
{
alert("Please enter your telephone number.");
document.forms.purchase.DonorsTel.focus();
return false;
}
}