Google script get data from forum

How to get data from forum url. I need to copy post count. I think i managed somehow to make the script but i dont know how to connect it with google spreadsheet.

It should go account by account in column B till last and update the column A with count.

The script doesn't report me any errors with this code

    function msg(message){
  Browser.msgBox(message);
}

function onOpen() {
  var ui = SpreadsheetApp.getUi();
  ui.createMenu("Update")
    .addItem('Update Table', 'updatePosts')
    .addToUi();
}

function getPostCount(profileUrl){
  var html = UrlFetchApp.fetch(profileUrl).getContentText();
  var sliced = html.slice(0,html.search('Posts Per Day'));  
  sliced = sliced.slice(sliced.search('<dt>Total Posts</dt>'),sliced.length);
  postCount = sliced.slice(sliced.search("<dd> ")+"<dd> ".length,sliced.search("</dd>"));

  return postCount;
}

function updatePosts(){

  if(arguments[0]===false){
    showAlert = false;
  } else {
    showAlert=true;
  }

  var spreadSheet = SpreadsheetApp.getActiveSpreadsheet();
  var accountSheet = spreadSheet.getSheetByName("account-stats");
  var statsLastCol = statsSheet.getLastColumn();
  var accountCount = accountSheet.getLastRow();
  var newValue = 0;
  var oldValue = 0;
  var totalNewPosts = 0;
  for (var i=2; i<=accountCount; i++){ 
    newValue = parseInt(getPostCount(accountSheet.getRange(i, 9).getValue())); 
    oldValue = parseInt(accountSheet.getRange(i, 7).getValue());
    totalNewPosts = totalNewPosts + newValue - oldValue;
    accountSheet.getRange(i, 7).setValue(newValue);    
    statsSheet.getRange(i,statsLastCol).setValue(newValue-todaysValue); 

  }
  if(showAlert==false){
    return 0;
  }
  msg(totalNewPosts+" new post found!");  
}


function valinar(needle, haystack){
  haystack = haystack[0]; 
  for (var i in haystack){

    if(haystack[i]==needle){
      return true;
    } 
  }


  return false;
}

Assuming this is the first time im doing something similar and working by the example from other site i really stuck.

I have one more question. In function getPostCount i send the function profileurl. Where i declare that ??