js代码

<script>$(document).ready(function() {
        
		$('.user_before').show();
		function shockCat (){
			$('.user_before').hide();
			$('.user_after').show();
			}
		function ReCat (){
			$('.user_after').hide();
			$('.user_before').show();
			}
		function picShow(object){
			object.fadeIn("slow");
			}
		
		function picHide(object){
			object.fadeOut("slow");
			}		
		var Long =  $(".user_point li").length;
		 var pIndex = 0;
		var autoChange = setInterval(function(){		
		 var pic =$(".point").eq(pIndex); 
		   picShow(pic);
	       picHide(pic);
		   ReCat ();
        if( pIndex < Long-1){ 	  
           pIndex ++;    
             }
			else { 	
			
            pIndex =0;
			shockCat ();
                } 		    
            },100);	 
			
				
								
    });
</script>