Need to remove carriage returns, spaces, etc.

Hello,

I am trying to build a string that is on one line,

1,2,3,4,5,6,7,8,9

however, I wind up with each number on a separate line.

1,

2,

3,

4,

5,

6,

7,

8,

9

My code looks like this:

var xxx = "";

for (var i=1; i<= nNumWords; i++) {

      global.srchVals[i].name = "Payor Mix";

   global.srchVals[i].mode = 0;

   xxx = i;

   if (i < nNumWords) {

   xxx = xxx + ",";

  //xxx = xxx.replace(/\s+/g,"").trim();

  } else {

   xxx = xxx;

   //xxx = xxx.replace(/\s+/g,"").trim();

  }  

      var PMItms = [xxx];

   //console.println(xxx);

}

I tried using the following line of code to remove carriage returns and spaces:

   xxx = xxx.replace(/\s+/g,"").trim();

But it keeps on giving me the following error:

TypeError: xxx.replace(/\s+/g, "").trim is not a function

Any help is appreciated.

Thanks

Linda