详解JS生成随机数

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

function generateMixed(n) {
    var chars = ['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'];
     var res = "";
     for(var i = 0; i < n ; i ++) {
         var id = Math.ceil(Math.random()*35);
         res += chars[id];
     }
     return res;
}