function noenter() {
	return !(window.event && window.event.keyCode == 13); 
}

function handleEnter (field, event) {
var keyCode = event.keyCode ? event.keyCode : event.which ? event.which : event.charCode;
if (keyCode == 13) {
var i;
for (i = 0; i < field.form.elements.length; i++)
	if (field == field.form.elements[i])
	 break;
i = (i + 1) % field.form.elements.length;
field.form.elements[i].focus();
return false;
} 
else
return true;
}