JavaScript break跳出多重循环

转自：http://www.cnblogs.com/gordonchao/archive/2011/04/15/2017406.html

多重循环在编程中会经常遇到，那么在JavaScript中如何指定跳出那层的循环呢。其实这也是break的一个用法，下面是一个不错的例子，来自《JavaScript权威指南》，可以参考下：
Code

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<script type="text/javascript">

outerloop://命名外圈语句

for(i=0; i<10; i++)

{

    innerloop://命名内圈语句

    for(j=0; j<10; j++)

    {

        // 跳出内圈循环

        if(j>3){break;}

        // 跳出内圈循环

        if(i==2){break innerloop;}

        // 跳出外圈循环

        if(i==4){break outerloop;}

        document.write("i = "+i+" , j = "+j+"<br />");

    }

}

document.write("final"+" i = "+i+" , j = "+j);

</script>

程序运行结果：

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i = 0 , j = 0

i = 0 , j = 1

i = 0 , j = 2

i = 0 , j = 3

i = 1 , j = 0

i = 1 , j = 1

i = 1 , j = 2

i = 1 , j = 3

i = 3 , j = 0

i = 3 , j = 1

i = 3 , j = 2

i = 3 , j = 3

final i = 4 , j = 0