横向滚动插件

(function ( $ ) {
    
    $.fn.ilscroll=function(options){
        var settings = $.extend({
      s:45
    }, options );
        $this=this;
        $children=this.children();
        $parent=this.parent();
        $count=$children.size();
        $margin=parseInt($children.css('margin-left'))+parseInt($children.css('margin-right'));

$childrenwidth=$children.width()+$margin;
$parentwidth=$parent.width();
$width=($count*$childrenwidth);
        if($width<$parentwidth){
            return false;
        }
         $clone= $children.clone();
         this.prepend($clone);
        this.width($width*2);
    $inter=    setInterval(function(){
            $marginleft=$this.css('margin-left');
            
  $marginleft=             parseInt($marginleft);
 $childh=   parseInt($this.children().width());
  if(Math.abs($marginleft)>=$width){
      $this.css('margin-left',"0px");
  
  }else{
            $this.css('margin-left',$marginleft-1+"px");
        }
        },settings.s);
            
        this.on('mouseover',function(){
            clearInterval($inter);
        });
        this.on('mouseout',function(){
        $inter=setInterval(function(){
            $marginleft=$this.css('margin-left');
            
  $marginleft=             parseInt($marginleft);
 $childh=   parseInt($this.children().width());
  if(Math.abs($marginleft)==$width){
      $this.css('margin-left',"0px");
  
  }else{
            $this.css('margin-left',$marginleft-1+"px");
        }
        },settings.s);
        });
        
    };
    
    }( jQuery ));

 当子元素不比父元素宽时，不会发生滚动。

使用

$('.foo').ilscroll()

一个参数s用于控制速度.

修改用于应对margin-auto

(function ( $ ) {
	
	$.fn.ilscroll=function(options){
		var settings = $.extend({
      s:45
    }, options );
		$this=this;
		$children=this.children();
		$parent=this.parent();
		$count=$children.size();
		$marginleft=$children.css('margin-left')=='auto'?0:parseInt($children.css('margin-left'));
		if($children.css){
			
		}
		$children.css('margin-left','0px');
		$children.css('margin-right','0px');
		$margin=parseInt($children.css('margin-left'))+parseInt($children.css('margin-right'));

$childrenwidth=parseInt($children.width())+$margin;
$parentwidth=parseInt($parent.width());
$width=($count*$childrenwidth);
		if($width<$parentwidth){
			return ;
		}else{
		
		 $clone= $children.clone();
		 this.prepend($clone);
		this.width($width*2);
		}
	$inter=	setInterval(function(){
			$marginleft=$this.css('margin-left');
		if($marginleft==='auto'){
			$marginleft=0;
		}else{
			 $marginleft=parseInt($marginleft);
		}
		
 
 
 $childh=   parseInt($this.children().width());
  if(Math.abs($marginleft)>=$width){
  	$this.css('margin-left',"0px");
  
  }else{
  	
			$this.css('margin-left',(($marginleft)-1)+"px");
		}
		},settings.s);
			
		this.on('mouseover',function(){
			clearInterval($inter);
		});
		this.on('mouseout',function(){
		$inter=setInterval(function(){
			$marginleft=$this.css('margin-left');
			
  $marginleft=			 parseInt($marginleft);
 $childh=   parseInt($this.children().width());
  if(Math.abs($marginleft)==$width){
  	$this.css('margin-left',"0px");
  
  }else{
			$this.css('margin-left',$marginleft-1+"px");
		}
		},settings.s);
		});
		
	};
	
	}( jQuery ));