alert出数组中的随即值

/*
* 随即alert出数组的值
* a表示数组
*/
function alert1(a)
{
    var alength = a.length;
    if (alength > 1)
    {
        var r = random1(0,alength);
        alert(a[r]);
        a[r] = -1;
        var temp = Array(alength-1);
        var t = false;
        for(var i = 0; i<a.length; i++)
        {
            if ( i == r){
                t = true;
            }
            else{
                if (t == false){
                	temp[i] = a[i];
                }else{
                	temp[i-1] = a[i];
                }
            }
        
        }
        alert1(temp);
    }
    else
    {
        alert(a[0]);
    }
}

 

/*
*
* 随即的到min（包含）和max（不包含）之间的值
*/
function random1(min, max){
    return Math.floor(min + ((Math.random() * 10) % (max - min)));
}