function checkJS () {
  if(document.getElementById("ResolutionBox"))
  {
    document.getElementById("ResolutionBox").innerHTML = "";
  }
}

function setActiveStyleSheet(title) {
  var i, a, main;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
      a.disabled = true;
      if(a.getAttribute("title") == title) a.disabled = false;
    }
  }
}

function getPreferredStyleSheet() {
  var style = (screen.width < 1280) ? "1024" : "1280";
  return style;
}

window.onload = function(e) {
  checkJS();
  var title = getPreferredStyleSheet();
  setActiveStyleSheet(title);
}

var title = getPreferredStyleSheet();
setActiveStyleSheet(title);