functiongetCookie(name){var r = document.cookie.match("\\b"+ name +"=([^;]*)\\b");return r ? r[1]: undefined;}
代码片2
functiongenerateUUID(){var d =newDate().getTime();if(window.performance &&typeof window.performance.now ==="function"){
d += performance.now();//use high-precision timer if available}var uuid ='xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g,function(c){var r =(d + Math.random()*16)%16|0;
d = Math.floor(d/16);return(c=='x'? r :(r&0x3|0x8)).toString(16);});return uuid;}