function getSize(target) {
     var a = new Ajax.Request(   
         "get_size.asp",   
        {   
            method: "get",
            asynchronous: false,
            encoding : "SHIFT_JIS",
            parameters: { "target" : target },
            onSuccess: function(request) {
            },
            onComplete: function(request) {
                alert('読み込みが完了しました:' + request.responseText);
            },
            onFailure: function(request) {
                alert('読み込みに失敗しました');
            }
        }
    );
}

Call Response.AddHeader( "Content-Type", "text/html; Charset=shift_jis" )
Response.ExpiresAbsolute=#May 31,2000 23:59:59#

Set Fso = Server.CreateObject( "Scripting.FileSystemObject" )

target = "e:\user\xxxxx\xxxxx\xxxxx\www\" & Request.QueryString("target")

on error resume next
Set objFolder = Fso.GetFolder( target )
if Err.Number <> 0 then
	Response.Write Err.Description
else
	Response.Write (Fix(objFolder.Size / 1000) / 1000) & " M" 
end if
on error goto 0