function VerifyCheckbox() {
if
(
	(document.forms['sockets'].a1.checked == false ) &&
	(document.forms['sockets'].b1.checked == false ) &&
	(document.forms['sockets'].c1.checked == false ) &&
	(document.forms['sockets'].k1.checked == false ) &&
	(document.forms['sockets'].l1.checked == false ) &&
	(document.forms['sockets'].d1.checked == false ) &&
	(document.forms['sockets'].e1.checked == false ) &&
	(document.forms['sockets'].e2.checked == false )
)
{alert('You must select at least one VIDEO OUT on your computer/laptop!');return (false);}
else if
(
	(document.forms['sockets'].e1.checked == false ) &&
	(document.forms['sockets'].e2.checked == false ) &&
	(document.forms['sockets'].h2.checked == false ) &&
	(document.forms['sockets'].i2.checked == false ) &&
	(document.forms['sockets'].j2.checked == false )
)
{alert('You must select at least one SOUND OUT on your COMPUTER/LAPTOP!');return (false);}
else if
(
	(document.forms['sockets'].a3.checked == false ) &&
	(document.forms['sockets'].b3.checked == false ) &&
	(document.forms['sockets'].c3.checked == false ) &&
	(document.forms['sockets'].d3.checked == false ) &&
	(document.forms['sockets'].e3.checked == false ) &&
	(document.forms['sockets'].f3.checked == false ) &&
	(document.forms['sockets'].e4.checked == false ) &&
	(document.forms['sockets'].f4.checked == false ) &&
	(document.forms['sockets'].g3.checked == false )
)
{alert('You must select at least one VIDEO IN on your TV/VHS/DVD/SKY/VIRGIN BOX!');return (false);}
else if
(
	(document.forms['sockets'].h4.checked == false ) &&
	(document.forms['sockets'].i4.checked == false ) &&
	(document.forms['sockets'].j4.checked == false ) &&
	(document.forms['sockets'].e4.checked == false ) &&
	(document.forms['sockets'].f4.checked == false ) &&
	(document.forms['sockets'].e3.checked == false ) &&
	(document.forms['sockets'].f3.checked == false )
)
{alert('You must select at least one SOUND IN on your TV/VHS/DVD/SKY/VIRGIN BOX!');return (false);}

else return (true);
}