JavaScript小應用之分頁算法

效果圖：

[img]http://dl2.iteye.com/upload/attachment/0123/7387/58c8f1e7-ef11-35c4-a09c-282ec7575e56.png[/img]

var curPage = 5, pagesize = 8, count = 38;
var pageContent = (function(){
	var pl = curPage; // pager left
	var cur_item = "<b>" + pl + "</b>";
	var nl = 0; // number left
	while(--pl > 0){
		cur_item = "<a>" + pl +"</a>" + cur_item;
		nl++;
		if(nl >= 2 && pl > 3){
			cur_item = "<a>1</a><i>...</i>" + cur_item;
			break;
		}
	}

	var total = Math.ceil(count/pagesize);
	var pr = curPage; // pager right
	var nr = 0; // number right
	while(++pr <= total){
		cur_item = cur_item + "<a>" + pr +"</a>";
		nr++;
		if( (1 + nl + nr) >= 5 && pr < (total -1 )){
			cur_item = cur_item + "<i>...</i><a>" + total + "</a>";
			break;
		}
	}

	return cur_item;
})();
console.log(pageContent);

測試：

var curPage = 1, pagesize = 8, count = 38;
// <b>1</b><a>2</a><a>3</a><a>4</a><a>5</a>

var curPage = 2, pagesize = 8, count = 38;
// <a>1</a><b>2</b><a>3</a><a>4</a><a>5</a>

var curPage = 5, pagesize = 8, count = 38;
// <a>1</a><a>2</a><a>3</a><a>4</a><b>5</b>


var curPage = 5, pagesize = 8, count = 200;
// <a>1</a><a>2</a><a>3</a><a>4</a><b>5</b><a>6</a><i>...</i><a>25</a>

var curPage = 10, pagesize = 8, count = 200;
// <a>1</a><i>...</i><a>8</a><a>9</a><b>10</b><a>11</a><a>12</a><i>...</i><a>25</a>

-


http://www.frontsurf.com/company/news?page=2

-