PavlaK

var Utils = {
	/* modified version of https://gist.github.com/1243697 
	*  adds detection of file extension rather than hard-coding .jpg as in the original
	*/
	_getExtension: function(fn) {
		// from http://stackoverflow.com/a/680982/292947
		var re = /(?:\.([^.]+))?$/;
		var tmpext = re.exec(fn)[1];
		return (tmpext) ? tmpext : '';
	},