javascript - Need assistance with if statement in Blackjack game -

i working on first black jack game , keep getting confused simplest thing. problem in if statement :

if ( cardsinhand < 7 && newcard != firstcard && newcard != secondcard ) 

and when press hit me button deal me same card on , on again. here function. need info in if statement true , execute, otherwise not execute.

cardsinhand = 2 firstcard = math.floor(math.random() * 1000 % 52) secondcard = math.floor(math.random() * 1000 % 52) newcard = math.floor(math.random() * 1000 % 52)  function hitcard() {   if ( cardsinhand < 7 && newcard != firstcard && newcard != secondcard )   {     document.images[cardsinhand].src = "http://www.biogow/images/cards/gbcard" + newcard + ".gif"      cardsinhand++   } } 

any idea why isnt working right?

it's not problem if statement itself. appears this:

newcard = math.floor(math.random() * 1000 % 52) 

is being done once rather every time hit. means will same card on , over.

you should recalculate new card every time perform hit operation.

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you should how you're generating cards. normally, use deck (containing 1 or more "real" decks) probabilities change cards removed, in real life.

that fix skewing problem using * 1000 % 52 tend prefer cards @ 1 end of "deck".