JS：地铁报站

自从学习JS之后，遇到什么都想着用JS解决试试看，比如昨天坐地铁听到报站，就觉得可以用JS解决一下。

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JS：

//站点名称var arr = ["A","B","C","D","E"];//起始站点var index = 0;function bus(){    console.log("Current station is "+ arr[index] +", the next station is "+ arr[index+1] + ".");    index++;    if(index === arr.length-1){      arr.reverse();      index = 0;    }}//每到一个站点，执行一次bus()即可

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DEMO：Bus Broadcast