js判断http和https

if(protocolStr == "http:"){
				document.cookie = cname + "=" + escape(cvalue) + "; " + expires;
			}else if(protocolStr == "https:"){
				document.cookie = cname + "=" + escape(cvalue) + "; " + expires+";Secure=true";
				//https连接需要加Secure=true，http连接删除Secure参数
			}