Remove the last 16 digits at the end of text

[Ruriko]

I have a string that looks like this:

[APPLE PIE] Sei Shoujo Sentai Lakers 3 Battle Team Lakers 3 (100% FULL-PIC)_20121104_032834

I want to remove the digits at the end of the string, basically the 16 digits at the end of the string. In the end it should look like this:

[APPLE PIE] Sei Shoujo Sentai Lakers 3 Battle Team Lakers 3 (100% FULL-PIC)

This is my code that I have written so far

var str="[APPLE PIE] Sei Shoujo Sentai Lakers 3 Battle Team Lakers 3 (100% FULL-PIC)_20121104_032834";
var n=str.substr(1,74);
document.write(n);

The problem is the string will be different so each will have different amount of characters. So how I remove the digits at the end of the string in javascript?

[Logic Ali]

This is a multi-posted question and the spammer has had his answer already.

[007Julien]

Use str.substr(0,str.length-16) or a regular expression like this following which remove 16 (the number in curly brackets) digits or underscore (\d for a digit and _ in the square brackets) a the end (the $) of a string

var n=str.replace(/[\d_]{16}$/,'');