http://www.nowamagic.net/javascript/js_JumpLoops.php
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
01 |
<script
type="text/javascript"> |
02 |
outerloop://命名外圈语句 |
03 |
for(i=0;
i<10; i++) |
04 |
{ |
05 |
innerloop://命名内圈语句 |
06 |
for(j=0;
j<10; j++) |
07 |
{ |
08 |
//
跳出内圈循环 |
09 |
if(j>3){break;} |
10 |
//
跳出内圈循环 |
11 |
if(i==2){break innerloop;} |
12 |
//
跳出外圈循环 |
13 |
if(i==4){break outerloop;} |
14 |
document.write("i
= "+i+"
, j = "+j+"<br
/>"); |
15 |
} |
16 |
} |
17 |
document.write("final"+"
i = "+i+"
, j = "+j); |
18 |
</script> |
程序运行结果：
01 |
i
= 0 , j = 0 |
02 |
i
= 0 , j = 1 |
03 |
i
= 0 , j = 2 |
04 |
i
= 0 , j = 3 |
05 |
i
= 1 , j = 0 |
06 |
i
= 1 , j = 1 |
07 |
i
= 1 , j = 2 |
08 |
i
= 1 , j = 3 |
09 |
i
= 3 , j = 0 |
10 |
i
= 3 , j = 1 |
11 |
i
= 3 , j = 2 |
12 |
i
= 3 , j = 3 |
13 |
final
i = 4 , j = 0 |