JavaScript EasyPager 分页函数

var EasyPager = function(wrap,pageCount,currPage){ 
var d = document 
,el = function(tag,inner,click,css){ 
tag = d.createElement(tag); 
inner && (tag.innerHTML = inner); 
click && (tag.onclick = click); 
css && (tag.className=css); 
return tag; 
} 
,append = function(parent,children,child){ 
children = [].concat(children); 
for(var i=0,j=children.length;i<j;i++){ 
child = children[i]; 
child && parent.appendChild(child); 
} 
return parent; 
} 
,easyFn = function(n){return function(){EasyPager(wrap,pageCount,n)}} 
,box = el("div"),firstPage,prevPage,lastPage,nextPage,startNum,endNum,pages= []; currPage!=1 && (firstPage = el("span","<<",easyFn(1)),prevPage = el("span","<",easyFn(currPage-1))); 
currPage!=pageCount && (lastPage = el("span",">>",easyFn(pageCount)),nextPage = el("span",">",easyFn(currPage+1))); 
(pageCount<=10) ? (startNum=1,endNum=pageCount) : (startNum=currPage-4,endNum = currPage+5,(currPage<=5) && (startNum=1,endNum=10),(currPage>=pageCount-5)&&(endNum=pageCount,startNum=pageCount-10+1)); 
for(var i=startNum;i<=endNum;i++)pages.push(el("span",i,easyFn(i),i==currPage?"currSpan":null)) 
append((wrap.innerHTML="",wrap),append(box,[firstPage,prevPage].concat(pages).concat(nextPage,lastPage))); 
};