jQuery + Ajax + PHP rolling load

function ajax_more () {  
     $ type = isset ( $ _POST ? [ 'type']) (int) INPUT Yin :: _ ( 'post.type'): 0 ;  
     // parameters passed   
    $ Page = isset ( $ _POST [ ' Page '?]) (int) Yin :: _ the INPUT (' post.page '): 2 ;  
     // item number displayed per page   
    $ pageSize = 10 ;  
     // check out the list of data   
    $ list = $ the this -> Product -> get_page_list ( $ type , '', $ Page , $ pageSize );  
     echo json_encode ( $ List );  
     Exit;  
}  

// drop down loading js code   
var Page = 2, // Record Length   
// Boolean parameter, determines whether to allow loading   
BOOL = to true ,  
 // total height of the page height across the recording // ,,   
ST = $ (Document) .innerHeight ();  
 // $ ( 'loading.') offset () Top;..   
// less time to make a list of compatible content processing   
IF (! {BOOL)   
    $ ( '.loading' ) .hide ();   
    $ ( '.nothing_all' ) the .Show ();   
}   
function Refresh () {  
     IF (! BOOL) { return ;}   
    BOOL = to false ;  
     //console.log(page);  
    var data = {  
        'page' : page,  
        'pagesize' : {:$pagesize:},  
        'type' : {:$type:}  
    }  
    $.post(  
        '/index.php?m=shop&c=list&a=ajax_more',  
        data,  
        function(d){  
            if (d.length>0) {  
                var html = '';  
                for (var i = 0; i < d.length; i++) {  
                    var v = d[i];  
                    //具体的代码  
                };  
                $('#append').append(html);  
                if (d.length==data.pagesize) {    
                    page++;  
                    st = $(document).innerHeight();  
                    bool = true;  
                }  
            }else{  
                bool = false;  
            }  
    },'json');  
}  
$(window).scroll(function(event) {  
      var$ = S (Document) .scrollTop () + $ (window) .height ();  
       IF (S> (ST-100)) { // reserve space bottom 100px   
          IF (! {BOOL)   
              $ ( '.loading' ) .hide ();   
              $ ( '.nothing_all' ) the .Show ();  
               return  to false ;   
          } the else {   
              Refresh ();   
          }   
      }   
});