// JavaScript Document
function validate_form(nn)
{
var i;
for (i=1; i<=12; i++)
if (i==nn){
	valid = true;

        if ( ( document.getElementById("contact_form"+i).product_sku[0].checked == false ) && ( document.getElementById("contact_form"+i).product_sku[1].checked == false ) && ( document.getElementById("contact_form"+i).product_sku[2].checked == false ) )
        {
                alert ( "Please choose swab size from the options listed above prior button Add To Cart" );
                valid = false;
        }

        return valid;
}
}