function unset () {

// http://kevin.vanzonneveld.net

// + original by: Brett Zamir (http://brett-zamir.me)

// * example 1: var arr = ['a', 'b', 'c'];

// * example 1: unset('arr[1]');

// * returns 1: undefined

// Must pass in a STRING to indicate the variable, not the variable itself (whether or not that evaluates to a string)

// Works only on globals

var i=0, arg = '', win='', winRef=/^(?:this)?window[.[]/, arr=[], accessor='', bracket=/\[['"]?(\d+)['"]?\]$/;

for (i=0; i < arguments.length; i++) {

arg = arguments[i];

winRef.lastIndex = 0, bracket.lastIndex = 0;

win = winRef.test(arg) ? '' : 'this.window.';

if (bracket.test(arg)) {

accessor = arg.match(bracket)[1];

arr = eval(win+arg.replace(bracket, ''));

arr.splice(accessor, 1); // We remove from the array entirely, rather than leaving a gap

}

else {

eval('delete '+win+arg);

}

}

}