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<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<script>
/*职责链模式 所有对象依次处理请求，1不能处理传给2，2不能处理传给3....*/
/*场景 打折 100以下不打折， 100-200 9折 200-400 8折*/
/*好处 处理对象分离，降低耦合度*/
function hander(number){
var secHd = new handle9Discount();
var thirHd = new handle8Discount(thirHd);
var hd= new handleDisCount(secHd).disPrice(number);
}
function handleDisCount(nextHander) {
var me = this;
this.nextHander = nextHander;
this.disPrice = function(number) {
if (number < 100) {
alert("已处理,原件出售:" + number);
} else {
me.nextHander.disPrice(number);
}
}
}
function handle9Discount(nextHander) {
var me = this;
this.disPrice = function(number) {
if (100 < number && number < 200) {
alert("已处理9折销售" + (number * 0.9))
} else {
me.nextHander.disPrice(number);
}
}
}
function handle8Discount(nextHander) {
var me = this;
this.disPrice = function(number) {
if (200 < number && number < 400) {
alert("已处理8折销售" + (number * 0.8))
} else {
alert("无法处理！");
}
}
}
hander(199);
</script>
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</html>
原文：http://www.cnblogs.com/yqlog/p/5568146.html