if (!Array.prototype.pop) { Array.prototype.pop = function() { var last; if (this.length) { last = this[this.length - 1]; this.length -= 1;}
return last;};}
if (!Array.prototype.push) { Array.prototype.push = function() { for (var i = 0; i < arguments.length; ++i) { this[this.length] = arguments[i];}
return this.length;};}
if (!Array.prototype.shift) { Array.prototype.shift = function() { var first; if (this.length) { first = this[0]; for (var i = 0; i < this.length - 1; ++i) { this[i] = this[i + 1];}
this.length -= 1;}
return first;};}
if (!Array.prototype.unshift) { Array.prototype.unshift = function() { if (arguments.length) { var i, len = arguments.length; for (i = this.length + len - 1; i >= len; --i) { this[i] = this[i - len];}
for (i = 0; i < len; ++i) { this[i] = arguments[i];}
}
return this.length;};}
if (!Array.prototype.splice) { Array.prototype.splice = function(index, howMany) { var elements = [], removed = [], i; for (i = 2; i < arguments.length; ++i) { elements.push(arguments[i]);}
for (i = index; (i < index + howMany) && (i < this.length); ++i) { removed.push(this[i]);}
for (i = index + howMany; i < this.length; ++i) { this[i - howMany] = this[i];}
this.length -= removed.length; for (i = this.length + elements.length - 1; i >= index + elements.length; --i) { this[i] = this[i - elements.length];}
for (i = 0; i < elements.length; ++i) { this[index + i] = elements[i];}
return removed;};}