function chkRequired(form){

var radio_choice = false;
var radio_choice_value = "";

for (idx = 0; idx < form.ECARDSELECTION.length; idx++) {
	if (form.ECARDSELECTION[idx].checked) {
		radio_choice_value = form.ECARDSELECTION[idx].value;
		radio_choice = true; 
	}
}

if (!radio_choice) {
	alert("Please select a card.")
	return (false);
}

if (form.FORM_SENDERNAME.value == "")
{
	alert("A name is required");
	form.FORM_SENDERNAME.focus();
	return false;	
}

if (form.FORM_SENDEREMAIL.value == "")
{
	alert("An e-mail address is required");
	form.FORM_SENDEREMAIL.focus();
	return false;	
}

if (form.FORM_RECIPENTEMAIL.value == "")
{
	alert("An e-mail address is required");
	form.FORM_RECIPENTEMAIL.focus();
	return false;	
}

return true;
}

function postPreview(form) {

	if (chkRequired(form)) {
		  window.open('','Preview','toolbar=no,location=no,scrollbars=yes,width=976,height=616');   
		  oldAction =   form.action;
		  oldTarget =   form.target;
		  form.target ="Preview";
		  form.action = "displayecard.asp";
		  form.submit();
		  form.action = oldAction;
		  form.target = oldTarget;		   
	}
	return false;
}