// ÆÄÀÏ È®ÀåÀÚ ¹Ýȯ
function my_getExt(fName)
{
	var a = fName.split(".");
	var res = a[a.length - 1].replace("/", "").replace("\\", "");
	if(res.length > 5 || res.length < 1) res = false;
	return res;
}