js获取路径

function getRootPath() { // get websocket basic path
		var strFullPath = window.document.location.href;
		var strPath = window.document.location.pathname;
		var pos = strFullPath.indexOf(strPath);
		var prePath = strFullPath.substring(0, pos);
		var postPath = strPath.substring(0, strPath.substr(1).indexOf('/') + 1);
		var rootPath = prePath + postPath;
		return (rootPath);
	}