$.extend({
	_enc_div: null,
	htmlenc: function(val) {
		if (this._enc_div == null) this._enc_div = $('<div />');
		this._enc_div.text(val);
		return this._enc_div.html().replace("\n", "<br />");
	},
	htmldec: function(val) {
		if (this._enc_div == null) this._enc_div = $('<div />');
		this._enc_div.html(val);
		return this._enc_div.text();
	},
	preload_images: function(images, pointer, callback) {
		if (images.length > pointer) {
			$('<img />').load(function() {
				$.preload_images(images, pointer + 1, callback);
			}).attr('src', images[pointer]);
		} else {
			callback();
		}
	}
});

var lock = false;

$(function() {
	if (lock) return;
	lock = true;
});