javascript 获取站点根地址（URL）

/** * 获取网站根地址，如果是虚拟目录则带有虚拟目录名 * @param isVirtual 是否虚拟目录 * @returns {String} */function getSiteRoot(isVirtual) {var siteRoot = window.location.protocol +"//"+ window.location.host +"/";if(!isVirtual) return siteRoot;var relativePath = window.location.pathname;if(relativePath != "" && relativePath.substring(0,1) == "/"){//此处重要，不同的浏览器可能返回的relativePath不一样relativePath = relativePath.substring(1);}var virtualPath = (relativePath == "") ? "" : relativePath.substring(0, relativePath.indexOf("/") + 1);return siteRoot + virtualPath;}