一种保存变量的方法

     今天在研究司徒正美的伪事件系统的代码，跟他学到了一个保存变量的方法。之前我保存变量多数都是用 jquery 的 data 方法来保存。

现在才知道其实用 {} 或 [] 里的属性和方法用保存也是不错的法子。

 1         function ctdClickEvent(e)
 2         {
 3             if( !-[1,] )
 4             {
 5                 var readonly = "readOnly";
 6                 var obj = window.event.srcElement;
 7             }else{
 8                 var readonly = "readonly";
 9                 var obj = e.currentTarget; 
10             }
11             
12             var id = obj.id.replace("btn_","");
13             
14             if( obj.value=="此项不续费" )
15             {
16                 var Renewal = {};
17                 Renewal.startdate = $id("new_startdate2_" + id).value;
18                 Renewal.enddate = $id("new_enddate2_" + id).value;
19                 Renewal.price = $id("price2_" + id).value;
20                 Renewal.transprice = $id("transprice2_" + id).value;                
21                 
22                 obj.Renewal = Renewal;
23                 
24                 if( typeof($id("price2_" + id).value)=="number" )
25                     $id("order_sum").value = parseInt($id("order_sum").value) - parseInt($id("price2_" + id).value);
26                 if( typeof($id("transprice2_" + id).value)=="number" )
27                     $id("trans_sum").value = parseInt($id("trans_sum").value) - parseInt($id("transprice2_" + id).value);
28                 
29                 var startdate = $id("or_startdate2_" + id);
30                 var enddate = $id("or_enddate2_" + id);
31                 $id("new_startdate2_" + id).value = startdate.value;
32                 $id("new_enddate2_" + id).value = enddate.value;
33                 $id("price2_" + id).value = "0.00";
34                 $id("transprice2_" + id).value = "0.00";
35                 $id("guestneed2_" + id).value = "";
36                 obj.value = "此项续费";
37 
38                 $id("new_startdate2_" + id).setAttribute(readonly,"readonly");
39                 $id("new_enddate2_" + id).setAttribute(readonly,"readonly");
40                 $id("price2_" + id).setAttribute(readonly,"readonly");
41                 $id("transprice2_" + id).setAttribute(readonly,"readonly");
42                 $id("guestneed2_" + id).setAttribute(readonly,"readonly");
43                 
44                 $.datepicker._destroyDatepicker($id("new_startdate2_" + id));
45                 $.datepicker._destroyDatepicker($id("new_enddate2_" + id));
46             }else{
47                 $id("new_startdate2_" + id).value = obj.Renewal.startdate;
48                 $id("new_enddate2_" + id).value = obj.Renewal.enddate;
49                 $id("price2_" + id).value = obj.Renewal.price;
50                 $id("transprice2_" + id).value = obj.Renewal.transprice;
51                 
52                 if( typeof($id("price2_" + id).value)=="number" )
53                     $id("order_sum").value = parseInt($id("order_sum").value) + parseInt($id("price2_" + id).value);
54                 if( typeof($id("transprice2_" + id).value)=="number" )
55                     $id("trans_sum").value = parseInt($id("trans_sum").value) + parseInt($id("transprice2_" + id).value);
56                 
57                 obj.value = "此项不续费"; 
58     
59                 $id("new_startdate2_" + id).removeAttribute(readonly);
60                 $id("new_enddate2_" + id).removeAttribute(readonly);
61                 $id("price2_" + id).removeAttribute(readonly);
62                 $id("transprice2_" + id).removeAttribute(readonly);
63                 $id("guestneed2_" + id).removeAttribute(readonly);    
64 
65                 $("#new_startdate2_" + id).datepicker();
66                 $("#new_enddate2_" + id).datepicker();
67 
68             }
69         }