上传图片上传不了?

<input name="a_image" type="text" id="a_image" value="<%=rs("a_image")%>" size="40">
            <input type="button" name="Submit2" value="上传资料 " onClick="javascript:select_pic('z_yin');">



<script language="javascript">
function select_pic(editname)
{
  var editname=editname;
  var selPicWnd=window.open("upload_flash.asp?formname=myform&editname="+editname+"&uppath=bookpic&filelx=jpg","new","resizable=yes,width=580,height=320,top=0,scrollbars=yes");
  if (selPicWnd.opener==null)
    selPicWnd.opener=self;
  return false;
  
}   
   
</script>