function create_staffs(staffs)
{
	document.getElementById('staffs').options[1]=new Option("少于20人","5-20人");
	document.getElementById('staffs').options[2]=new Option("20-99人","20-99");
	document.getElementById('staffs').options[3]=new Option("100-499人","100-499人");
	document.getElementById('staffs').options[4]=new Option("500-999人","500-999人");
	document.getElementById('staffs').options[5]=new Option("1000-9999人","1000-9999人");
	document.getElementById('staffs').options[6]=new Option("10000人以上","10000人以上");
	for(var i = 0; i < document.getElementById('staffs').length; i++)
	{
		if (document.getElementById('staffs').options[i].value==staffs)
		{
			document.getElementById('staffs').selectedIndex = i;
		}
	}
}