锘?function () {
        function $(param) {
        if (arguments[1] == true) {
            return document.querySelectorAll(param);
        } else {
            return document.querySelector(param);
        }
    }
	var $box = $(".slider1");
	var $box1 = $(".slider1 ul li",true);
	var $length = $box1.length;
	
	

	
	var current = 0;
	
	var timer;
	timer = setInterval(go,2000);
	function go(){
		for(var j =0;j<$length;j++){
			$box1[j].style.display = "none";
		
		}
		if($length == current){
			current = 0;
		}
		$box1[current].style.display = "block";
		
		current++;
	}
	
	for(var k=0;k<$length;k++){
		$box1[k].onmouseover = function(){
			clearInterval(timer);
		}
		$box1[k].onmouseout = function(){
			timer = setInterval(go,2000);
		}
	}

	

	function back(){
		for(var j =0;j<$length;j++){
			$box1[j].style.display = "none";	
		}
		if(current == 0){
			current = $length;
		}
		$box1[current-1].style.display = "block";
		
		current--;
	}
})()