// piaip's lightweight implementation of download.js
// March 2011: modified by littlebtc orz
// March 2011: modified by petercpg for detecting mobile platforms
function getPlatform() {
  if (navigator.platform.indexOf("Win32") != -1 || navigator.platform.indexOf("Win64") != -1)
    return "win";
  
  //Linux 放在最後，以免其他 Linux based 裝置也被當成桌面 linux
  if (navigator.userAgent.indexOf("Android") != -1)
    return "android";
  if (navigator.userAgent.indexOf("Maemo") != -1)
    return "maemo";
  if (navigator.platform.indexOf("Linux") != -1)
    return "linux";    
  
  //Mac 放在最後，以免其他 OSX based 裝置也被當成桌面 OSX
  if(navigator.userAgent.match(/iP(hone|od|ad)/i))
    return "ios";
  if (navigator.userAgent.indexOf("Mac OS X") != -1)
    return "mac";
  return "unknown";
}

function highlightDownload() {
  var platform = getPlatform();
  if (platform != "unknown") { // Unknown 的情況就不 Prefer 任何平台的連結
    var e = document.getElementById("download-link-" + platform);
    if (e) {
      e.className = e.className + ' preselected';
    }
  }
  // 換首頁圖
  var eFeature = document.getElementById("front-feature");
//  if (eFeature && platform != "unknown" && platform != "win") {
//    eFeature.style.backgroundImage = "url(images/4-feature-" + platform + ".png)";
//  }
  
  // 換首頁 Feature Block
  eFeature = document.getElementById("replace-this");
  if (eFeature && platform != "unknown"){
	if (platform == "ios"){
		eFeature.className += " hide";
		eFeature = document.getElementById("mobile-feature-ios");
		eFeature.className = eFeature.className.replace(/\bhide\b/,'');
	}
	else if (platform == "android" || platform == "maemo" ){
		eFeature.className += " hide";
		eFeature = document.getElementById("mobile-feature-android");
		eFeature.className = eFeature.className.replace(/\bhide\b/,'');
	}
  }
}