JS实现随机数

<script>
functionGetRandomNum(Min,Max)
{
varRange=Max-Min;
varRand=Math.random();
return(Min+Math.round(Rand*Range));
}
varnum=GetRandomNum(1,10);
alert(num);
</script>

varchars=['0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'];

functiongenerateMixed(n){
varres="";
for(vari=0;i<n;i++){
varid=Math.ceil(Math.random()*35);
res+=chars[id];
}
returnres;
}