查看“JS案例：计算账单金额”的源代码

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<title>商品统计总价示例</title>
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<script type="text/javascript">
		var list=100; //标价
		var rate=0.05; //税率
		var tax; //税金
		var totle; //总金额
		tax=list*rate; //税金等于标价*税率
		totle=list+tax; //总金额等于标价+税金
		document.writeln("商品的总金额="+totle);
		document.writeln("商品的税金="+tax);
</script>
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