Help: Problem with 'this' in reading text file

programming flash
1

myData = new LoadVars();

myData.load(“data.txt”);

myData.onLoad = function()
{
n = random(myData.tot);

temp = "myData.q" + String(n);

myQuote.text = eval(temp);     // it works

myQuote.text = this[temp]      // it doesn't works, why ?

// is it because the DOT ? How to solve this problem using this

};

random_btn.onRelease=function()
{
myData.onLoad();
}