gistfile1.txt

var words:String = "foo bar";
var PH_oldArray:Array = words.split(" ");
var PH_newArray:Array = [];
var param1:String = "";

for each(var word:String in PH_oldArray)
{
  PH_newArray.push(word.charAt(0).toUpperCase() + word.slice(1));
}

param1 = PH_newArray.join(" ");