如何从这样的字符串中截取字符！

HungryBoy 2003-07-24 02:44:28

800000:3600:1641:476:?-4-2-[1]:480000:295200:481000:296000:480500:295600:34201:[polygon]:1640:
800000:3600:1642:477:?-4-2-[2]:481000:295200:482000:296000:481500:295600:34202:[polygon]:1641:
800000:3600:1643:478:?-4-2-[3]:482000:295200:483000:296000:482500:295600:34203:[polygon]:1642:
800000:3600:1684:424:?-4-2-[6]:480000:294400:481000:295200:480500:294800:34206:[polygon]:1683:
800000:3600:1685:425:?-4-2-[7]:481000:294400:482000:295200:481500:294800:34207:[polygon]:1684

从这个字符串中截取出与?-4-2-[1]类似的字符串组成新的字符串！
?-4-2-[1]没有规律的可以是任何字符！但是位置固定！

不知我说没说明白！！！

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HungryBoy 2003-07-24

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谢谢！！

无爱大叔 2003-07-24

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<SCRIPT LANGUAGE="JavaScript">
var str="800000:3600:1641:476:?-4-2-[1]:480000:295200:481000:296000:480500:295600:34201:[polygon]:1640:800000:3600:1642:477:?-4-2-[2]:481000:295200:482000:296000:481500:295600:34202:[polygon]:1641:800000:3600:1643:478:?-4-2-[3]:482000:295200:483000:296000:482500:295600:34203:[polygon]:1642:800000:3600:1684:424:?-4-2-[6]:480000:294400:481000:295200:480500:294800:34206:[polygon]:1683:800000:3600:1685:425:?-4-2-[7]:481000:294400:482000:295200:481500:294800:34207:[polygon]:1684"
strArr=str.split("800000")
for(i=1;i<strArr.length;i++){
alert(strArr[i].substr(15,9))
}
</SCRIPT>

HungryBoy 2003-07-24