function recursion(array) {
var randnum = Math.floor(Math.random()*(array.length));
if(array.length==0) alert('No elements in array');
else {
alert('Before delete ==> ' array);
array.splice(randnum,1);
alert('After delete==> ' array);
recursion(array);
}
}
arr = [1,2,3,4,5,6,7,8,9,10];
recursion(arr);