;(function($){
	$.fn.myslider = function( opt ) {
		var defaults = {
				speed: 300,
				direction: 'left', //  运动方向 可选 left,top
				prevclass: 'slider-prev',
				nextclass: 'slider-next',
				wrapperclass: 'slider-wrapper',
				moveclass: 'slider-move'
		};
		
		var options = $.extend( defaults, opt );
		var dir = options.direction;
		var $slider = $( this ),
			$wrapper = $( '.' + options.wrapperclass, $slider ),
			$sliderprev = $( '.' + options.prevclass, $slider ),
			$slidernext = $( '.' + options.nextclass, $slider ),
			$slidermove = $( '.' + options.moveclass, $slider ),
			$item = $slidermove.children(),
			timer = null;
		

		//初始化样式
		if( dir == 'left' ) {
			var $isteep = $item.outerwidth();
			$slidermove.css('width',$item.length * $isteep +'px' );
		} 
		else if( dir == 'top' ) {
			var $isteep = $item.outerheight();
			$slidermove.css('height',$item.length * $isteep +'px' );
		};

		//添加点击事件
		$slidernext.on('click',movenext);
		$sliderprev.on('click',moveprev);

		
		//缓存运动样式
		var data1 = {}, data2 = {};
		data1[dir] = -$isteep;
		data2[dir] = 0;

		//运动样式函数
		function movenext(){
			$slidermove.css( dir,-$isteep+'px').children().last().prependto( $slidermove );
			$slidermove.animate(data2,  options.speed);
		};

		function moveprev(){
			$slidermove.animate( data1,  options.speed, function(){
				$slidermove.css( dir, 0 ).children().first().appendto( $slidermove );
			});
		};
		
		return this; //返回当前对象,保证可链式操作
	}
})(jquery);