function doSelect(n, space){

  if(n > 0 && n <= 80){

    // Check if the number was previously selected
    if(document.keno.picks.value.indexOf(" "+n+" ")!=-1){

      document.keno.picks.value = document.keno.picks.value.replace(" "+n+" ","");
      space.src='kenoimages/blue'+n+'.gif'

    }else{

      var strCurNumbers = document.keno.picks.value;
      var aNumCount = strCurNumbers.split("  ");
      var ncount = aNumCount.length;

      if(ncount >= 20){
        alert("You may only have 20 numbers selected at one time.");
      }else{

        document.keno.picks.value += ' '+n+' ';
        space.src='kenoimages/red'+n+'.gif'

      }

    }

  }

}