JavaScript数组的应用——冒泡排序

    var a = [2,3,12,5,21,7,22,34,56,64];    for(var i=0; i< a.length-1; i++){   //从大到小        for(var j=0; j<a.length-1-i; j++){            if(a[j]<a[j+1]){                var t = a[j];                a[j] = a[j+1];                a[j+1] = t;            }        }    }    alert(a.toString());

   var a = [2,3,12,5,21,7,22,34,56,64];    for(var i=0; i< a.length-1; i++){   //从小到大        for(var j=a.length-1; j>i; j--){            if(a[j]>a[j+1]){                var t = a[j];                a[j] = a[j+1];                a[j+1] = t;            }        }    }    alert(a.toString());