讀取LRC同步歌詞的類

下面就是這個類：
code:

---

package LRC{
         public class readlrc {
         public function readlrcastime(mp3playtime:Number,gc:String):String {
                var qsd:int;//起始點
                var fhz:String;
                 for (var j:int=0; j < gc.length; j++) {
                              if (gc.charCodeAt(j) == 58) {
                                       if (int(gc.slice(j - 2,j)) * 60 + int(gc.slice(j + 1,j + 3)) == mp3playtime) {
                                                 var i:int=0;
                                                do {