var card_num=54;
function wash_card(card_num) {
var card=[],
tmp=[],
index;
for(var i=0;i<card_num;i++){
tmp[i]=i+1;
}
for(var i=0;i<card_num;i++){
index=Math.floor(Math.random()*(card_num-i));
card[i]=tmp[index];
tmp.splice(index,1);
}
return card;
}
console.log(wash_card(card_num));