function doSurveyPopUp() {
	document.getElementById('top').innerHTML += '<div style="position:absolute;top:100px;left:10px"><a style="font:700 .8em Arial,sans-serif;color:#fff" href="/survey.php">5 minute survey worth &pound;50 in accessories</a></div>';	
}

function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      if (oldonload) {
        oldonload();
      }
      func();
    }
  }
}

addLoadEvent(doSurveyPopUp);