<script language="Javascript">
		function factor(n)
		{
			if((n==0)||(n==1))
				return 1;
			else
			{
				result=(n*factor(n-1))
				return result;
			}
		}		
		var x=10;
		document.write("<BR>",x," 的階乘是:",factor(x));

	</script>