jquery 跳转到当前页面指定位置

 1 
 2 
 3 
 4     
 5     
 6     
21     
22         
49 
50 
51 
这是顶部，高度为100px
52 

53     

54         
first
55         
scond
56         
third
57         
four
58     
59 
60 
this is content1
61 
this is content2
62 
this is content3
63 
this is content4
64 
this is footer
65 
66