当前页居中分页效果的JS实现

function
show_page(cur_pc)

{

var
cp
=
cur_pc;
//
curent page count

var
tp
=
this
.p;
//
total page count

var
sp
=
this
.pc;
//
show page count

var
bp;
//
begin page count

var
ep;
//
end page count

if
(sp
%
2
==
0
) sp
=
sp
+
1
;
//
this process need an odd number

var
dp
=
Math.floor(sp
/
2);
//
each side count to show

var
dif
=
tp
-
sp;
//
check weather it have enough page to make mid-show

var
f
=
cp
-
dp;
//
to check weather it has enough page to make mid-show from the begin

var
g
=
tp
-
(cp
+
dp);
//
to check weather it has enough page to make mid-show from the end

if
(sp
&&
dif
>=
0
)

{

if
(g
>
0
)

{

if
(f
>
0
)

{

bp
=
f;

ep
=
cp
+
dp;

}

else

{

bp
=
1
;

ep
=
2
*
dp
+
1
;

}

}

else

{

bp
=
tp
-
2
*
dp;

ep
=
tp;

}

}

else

{

bp
=
1
;

ep
=
tp;

}

var
buf
=
[];

for
(
var
i
=
bp;i
<=
ep;i
++
)

{

if
(i
==
cur_pc)

{

buf.push(
"
<a href='javascript:;' class='current'>
"
,i,
"
</a>
"
);

}

else

{

buf.push(
"
<a href='javascript:;' class='normal'>
"
,i,
"
</a>
"
);

}

}

document.write(buf);

}







作者：梦想

出处：http://www.cnblogs.com/lhb25

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