// JavaScript Document
function no_dupes(oSelect)
{
	var oForm = oSelect.form, selval = oSelect.options[oSelect.selectedIndex].value;
	var el, i = 1, opt, j;
	while (el = oForm.elements['vote' + (i++)])
		if (el != oSelect)
		{
			j = 0;
			while (opt = el.options[j++])
				if (!opt.defaultSelected && (opt.selected && opt.value == selval))
				{
					alert('\nSelect each option only once.\nThank you!');
					oSelect.selectedIndex = 0;
					return false;
				}
		}
}