remove empty elements from array

removeEmpty

// pre 1.6
function cleanArray(actual){
  var newArray = new Array();
  for(var i = 0; i<actual.length; i++){
      if (actual[i]){
        newArray.push(actual[i]);
    }
  }
  return newArray;
}

removeEmpty.1.6

// js 1.6+
arr = arr.filter(function(n){ return n != undefined });