if($(window).width()>768){
 skrollr.init({
      forceHeight: false
    } );
  //  window.alert(userAgentInfo);
}
/*
function IsPC() {
  var userAgentInfo = navigator.userAgent;
  console.log(userAgentInfo);
  var Agents = ["Android", "iPhone", "CPU iPhone OS", "ios", "SymbianOS", "Windows Phone", "iPad", "iPod", "unknown"];
  var flag = false;
  if (userAgentInfo.indexOf(Agents) > 0 & flag) {
    flag = true;
    break;  
    alert(userAgentInfo);
  }
  else{
    skrollr.init({
      forceHeight: false
    } );
    window.alert(userAgentInfo);
  }
}
console.log(IsPC());*/
/** * 是否为mac系统（包含iphone手机） * */ 
var isMac = function() {
  return /macintosh|mac os x/i.test(navigator.userAgent);
};
console.log("IOS"+isMac());

if($(window).width()<768){
  $(".ul").removeClass("nav_block");
}