Javascript: Need help with a regex

I have an id that i want to match such that the last "_<digit(s)>" is ignored.
For eg, if i have an id="someid_2_0_3", the match should return "someid_2_0".
If the id="anotherid_31_2", the match should return "anotherid_31".
renisenbbAsked:
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zzynxSr. Software engineerCommented:
I think this
/(.*)_\d$/

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does it.
You can test it for yourself at regex101.com

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renisenbbAuthor Commented:
var cellregex = new RegExp(/(.*)_\d$/);
var c = "someid_2_0_3";
var s = c.match(cellregex);
alert (s);

This returns: someid_2_0_3,someid_2_0

How do i get it to only return the second value (someid_2_0)
renisenbbAuthor Commented:
I see, it is returning an array. Thanks.
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Karthik RamachandranCommented:
You don't need a regex for this. Sting operations would do well.
str.substring(1, str.lastIndexOf('_') - 1)

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Characters from 1st position to one_position before the last occurrence of '_' - 1.
zzynxSr. Software engineerCommented:
alert(s[1]);

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zzynxSr. Software engineerCommented:
Thanx 4 axxepting
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