//生成UUID算法
//算法 一
functionuuid(len,radix) {
varchars='0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.split('');
varuuid=[],
i;
radix=radix||chars.length;
if(len) {
for(i=0;i
}else{
varr;
uuid[8]=uuid[13]=uuid[18]=uuid[23]='-';
uuid[14]='4';
for(i=0;i<36;i++) {
if(!uuid[i]) {
r=0|Math.random()*16;
uuid[i]=chars[(i==19)?(r&0x3)|0x8:r];
}
}
}
returnuuid.join('');
}
//算法 二
generateUUID: (function() {
varchars='0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.split('');
varuuid=newArray(36);
varrnd=0,
r;
returnfunction() {
for(vari=0;i<36;i++) {
if(i==8||i==13||i==18||i==23) {
uuid[i]='-';
}elseif(i==14) {
uuid[i]='4';
}else{
if(rnd<=0x02)rnd=0x2000000+(Math.random()*0x1000000)|0;
r=rnd&0xf;
rnd=rnd>>4;
uuid[i]=chars[(i==19)?(r&0x3)|0x8:r];
}
}
returnuuid.join('');//返回36位的uuid通用唯一识别码 (Universally Unique Identifier).
};
}())
