var str="INFO] :谷���新道, ひば���ヶ丘2丁���, ひばりヶ���, 東久留米市 (Higashikurume)";
and i need to remove all non-ascii character from string,
means str only contain "INFO] (Higashikurume)";
ASCII is in range of 0 to 127, so:
str.replace(/[^\x00-\x7F]/g, "");