仿豆瓣分页原型(Javascript版)

好久没发过帖子了~~。
因为工作需要，仿豆瓣式写了个分页的样式。
自我感觉，这样的分页前后兼顾，对于用户的体验是蛮好使的。

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" 
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="gb2312" > 
<head> 
    <meta http-equiv="content-type" content="text/html; charset=gb2312" /> 
    <meta name="author" content="Smiling Dolphin" /> 
    <meta name="keywords" content="design, css, cascading, style, sheets, xhtml, graphic design, w3c, web standards, visual, display, java, javascript, c++, php, jsp, asp, py, pl" /> 
    <meta name="description" content="my favorites language." /> 
    <meta name="robots" content="all" /> 
    <title>仿豆瓣分页原型（Javascript版）</title>

var breakpage = 9; 
var currentposition = 4; 
var breakspace = 2; 
var maxspace = 4; 
var prevnum = currentpage-currentposition; 
var nextnum = currentpage+currentposition; 
if(prevnum<1) prevnum = 1; 
if(nextnum>pagecount) nextnum = pagecount;

pagestr += (currentpage==1)?'<span class="prev">< 前页</span>':'<span class="prev">< 前页</span>'; 
if(prevnum-breakspace>maxspace){ 
    for(i=1;i<=breakspace;i++) 
        pagestr += ''+i+''; 
    pagestr += '<span class="break">...</span>'; 
    for(i=pagecount-breakpage+1;i<prevnum;i++) 
        pagestr += ''+i+''; 
}else{ 
    for(i=1;i<prevnum;i++) 
        pagestr += ''+i+''; 
} 
for(i=prevnum;i<=nextnum;i++){ 
    pagestr += (currentpage==i)?'<span class="thispage">'+i+'</span>':''+i+''; 
} 
if(pagecount-breakspace-nextnum+1>maxspace){ 
    for(i=nextnum+1;i<=breakpage;i++) 
        pagestr += ''+i+''; 
    pagestr += '<span class="break">...</span>'; 
    for(i=pagecount-breakspace+1;i<=pagecount;i++) 
        pagestr += ''+i+''; 
}else{ 
    for(i=nextnum+1;i<=pagecount;i++) 
        pagestr += ''+i+''; 
} 
pagestr += (currentpage==pagecount)?'<span class="next">后页 ></span>':'<span class="next">后页 ></span>'; 
document.getElementById("pagebar").innerHTML = pagestr; 
</script> 
</body> 
</html>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

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