获取网站的BaseURL

//get base URL var _urlstr = window.location.href; if (_urlstr.indexOf("?") > -1) { _urlstr = _urlstr.substring(0, _urlstr.lastIndexOf("?")); } _urlstr = _urlstr.substring(0, _urlstr.lastIndexOf("/")); _urlstr = _urlstr.substring(0, _urlstr.lastIndexOf("/"));

例如：http://localhost:1781/tool/yakujihou.aspx

_urlstr为：http://localhost:1781