text: 
  
  
  var hiddenProperty = 'hidden' in document ? 'hidden' :
  	'webkitHidden' in document ? 'webkitHidden' :
  	'mozHidden' in document ? 'mozHidden' :
  	null;
  var visibilityChangeEvent = hiddenProperty.replace(/hidden/i, 'visibilitychange');
  var onVisibilityChange = function() {
  	if (!document[hiddenProperty]) {
  		document.title = "(๑•́ ω•̀๑)被你抓到了";
  		setTimeout(function(){document.title = "Ping's blog";},2000);
  	} else {
  		document.title = "(≧ω≦)我藏起来了";
  	}
  }
  document.addEventListener(visibilityChangeEvent, onVisibilityChange);
  
  /*
  $('#totop').click(function(){
  	console.log("totop");
  });
  $('#switch').click(function(){
  	console.log("switch");
  });*/