Something

var myData:LoadVars = new LoadVars()
var textFileNames:array = null;
myData.onLoad = function(success){
textFileNames = new Array();
for(var i=0; i<this.numalerts; i++){
textFileNames.push("text0"+i+".txt");
}
trace(textFileNames.toStrin())
}
myData.load("http://wfmy-iweb01/news/loading/BD/anastasio.php") //php line