ActionScript 去空格

 public function trim(strInput:String):String{
    
     var loopnum:int = strInput.length;
     for(var i:int=0; i < loopnum; i++) {
    
         if(strInput.charAt(0)==" ") {
             strInput = strInput.substring(1, strInput.length);
         }
         else if(strInput.charAt(strInput.length-1) == " ") {
             strInput = strInput.substring(0, strInput.length-1);
         } else {
             break;
         }
     }
      return strInput;
 }