function correct_min_max_field(type, minname, maxname)
{
	var minval = $('#'+minname).val();
	var maxval = $('#'+maxname).val(); 
	if (minval > maxval)
	{
		maxval = minval;
		var found = false;
		var next = false;
		// search for the next value
		$('#'+maxname+' option').each(function(k, v){
			if (!found) {
				if (next) {
					found = true;
					maxval = $(this).val();
				}
				else if ($(this).val() == minval) {
					next = true;
				}
			}
		});
		$('#'+maxname).val(maxval);
	}
}