text: console.log("scroll");
  var fn_scroll={
  	init:function(){
  		chrome.runtime.sendMessage({type:"scroll"},function(response){
  			var _options={
  				left:0,
  				top:0,
  				behavior:(response.effect?"smooth":"instant")
  			};
  			switch(response.type){
  				case"up":
  					_options.left=document.documentElement.offsetLeft;
  					_options.top=-(window.document.height==window.innerHeight?0:(window.innerHeight-20));
  					break;
  				case"down":
  					_options.left=document.documentElement.offsetLeft;
  					_options.top=(window.document.height==window.innerHeight?0:(window.innerHeight-20));
  					break;
  				case"left":
  					_options.left=-(window.innerWidth-20);
  					_options.top=0;
  					break;
  				case"right":
  					_options.left=(window.innerWidth-20);
  					_options.top=0;
  					break;
  				case"top":
  					_options.left=document.documentElement.offsetLeft;
  					_options.top=-(window.pageYOffset+50);
  					break;
  				case"bottom":
  					_options.left=document.documentElement.offsetLeft;
  					_options.top=Math.max(document.body.offsetHeight,document.body.clientHeight,document.body.scrollHeight,document.documentElement.clientHeight,document.documentElement.offsetHeight,document.documentElement.scrollHeight)-window.innerHeight-window.pageYOffset+50;
  					break;
  				case"leftmost":
  					_options.left=-(window.pageXOffset+50);
  					_options.top=0;
  					break;
  				case"rightmost":
  					_options.left=Math.max(document.body.offsetWidth,document.body.clientWidth,document.body.scrollWidth,document.documentElement.clientWidth,document.documentElement.offsetWidth,document.documentElement.scrollWidth)-window.innerWidth-window.pageXOffset+50;
  					_options.top=0;
  					break;
  			}
  			window.scrollBy(_options);
  		})
  	}
  }
  fn_scroll.init();