当页面内容非常多时，拖动页面滚动条很不方便，这时就可以利用JS定位到指定位置：
<input type="button" value="▼" onclick="location.href='#page_botom';" />
<input type="button" value="▲" onclick="location.href='#page_top';" />
【例】
1 <html>
2 <HEAD>
3 <TITLE> New Document </TITLE>
4 <META NAME="Generator" CONTENT="EditPlus">
5 <META NAME="Author" CONTENT="">
6 <META NAME="Keywords" CONTENT="">
7 <META NAME="Description" CONTENT="">
8 </HEAD>
9
10 <BODY>
11 <a name="page_top" />
12 到后面去！
13 <input type="button" value="▼" onclick="location.href='#page_botom';" />
14 <TABLE border="1" align="center" width="750">
15 <TR>
16 <TD>Number</TD>
17 <TD>Name</TD>
18 <TD>Sex</TD>
19 <TD>Age</TD>
20 <TD>Nationality</TD>
21 </TR>
22 <TR>
23 <TD>001</TD>
24 <TD>Lucy</TD>
25 <TD>Female</TD>
26 <TD>22</TD>
27 <TD>American</TD>
28 </TR>
29 </TABLE>
30 <div style="height:900px"></div>
31 <a name="page_botom" />
32 <hr/>
33 到前面去！
34 <input type="button" value="▲" onclick="location.href='#page_top';" />
35 <TABLE border="1" align="center" width="750">
36 <TR>
37 <TD>Number</TD>
38 <TD>Name</TD>
39 <TD>Sex</TD>
40 <TD>Age</TD>
41 <TD>Nationality</TD>
42 </TR>
43 <TR>
44 <TD>001</TD>
45 <TD>Lucy</TD>
46 <TD>Female</TD>
47 <TD>22</TD>
48 <TD>American</TD>
49 </TR>
50 </TABLE>
51 </BODY>
52 </HTML>
2 <HEAD>
3 <TITLE> New Document </TITLE>
4 <META NAME="Generator" CONTENT="EditPlus">
5 <META NAME="Author" CONTENT="">
6 <META NAME="Keywords" CONTENT="">
7 <META NAME="Description" CONTENT="">
8 </HEAD>
9
10 <BODY>
11 <a name="page_top" />
12 到后面去！
13 <input type="button" value="▼" onclick="location.href='#page_botom';" />
14 <TABLE border="1" align="center" width="750">
15 <TR>
16 <TD>Number</TD>
17 <TD>Name</TD>
18 <TD>Sex</TD>
19 <TD>Age</TD>
20 <TD>Nationality</TD>
21 </TR>
22 <TR>
23 <TD>001</TD>
24 <TD>Lucy</TD>
25 <TD>Female</TD>
26 <TD>22</TD>
27 <TD>American</TD>
28 </TR>
29 </TABLE>
30 <div style="height:900px"></div>
31 <a name="page_botom" />
32 <hr/>
33 到前面去！
34 <input type="button" value="▲" onclick="location.href='#page_top';" />
35 <TABLE border="1" align="center" width="750">
36 <TR>
37 <TD>Number</TD>
38 <TD>Name</TD>
39 <TD>Sex</TD>
40 <TD>Age</TD>
41 <TD>Nationality</TD>
42 </TR>
43 <TR>
44 <TD>001</TD>
45 <TD>Lucy</TD>
46 <TD>Female</TD>
47 <TD>22</TD>
48 <TD>American</TD>
49 </TR>
50 </TABLE>
51 </BODY>
52 </HTML>