//分页
(function(){
	window.pager = function(id, attrs) {
		this.extend({
			allowpage: true,
			pagesize: 10,
			page: 1,
			source: null //function(pagesize, page)
		}).extend(attrs);
		initdom.call(this, id);
		initevt.call(this);
	};
	var fn = pager.prototype;
	//初始化
	function initdom(id) {
		var div = this.div = dom.get(id);
		div.innerhtml =
			"<ul>" +
			"	<li class='total'>共 0 条记录</li>" +
			(this.allowpage ?
			"	<li class='navi'><a class='disabled'>首页</a><a class='disabled'>上页</a><a class='disabled'>下页</a><a class='disabled'>尾页</a></li>" +
			"	<li class='pagesize'></li>" +
			"	<li class='input'><input type='text' class='txt' value='1'/>/<span class='totalpage'></span><input type='button' class='go' value='去'/></li>" : "") +
			"</ul>" +
			"<div class='clear'></div>";
	}
	//初始化-事件
	function initevt() {
		var me = this;
		var ul = this.div.children[0],
			li = ul.children[1];
		li.children[0].onclick = function() {
			if (dom.hasclass(this, "disabled")) return;
			navi.call(me, "first");
		}
		li.children[1].onclick = function() {
			if (dom.hasclass(this, "disabled")) return;
			navi.call(me, "prev");
		}
		li.children[2].onclick = function() {
			if (dom.hasclass(this, "disabled")) return;
			navi.call(me, "next");
		}
		li.children[3].onclick = function() {
			if (dom.hasclass(this, "disabled")) return;
			navi.call(me, "last");
		}
		ul.children[3].children[0].onclick = function (evt) {
			if (evt.keycode == 13) {
				navi.call(me);
				return false; //阻止表单提交
			}
		}
		ul.children[3].children[2].onclick = function () {
			navi.call(me);
		}
	}
	function navi (method) {
		if (!this.allowpage) return;
		var ul = this.div.children[0];
		var input = ul.children[3].children[0];
		var totalpage = math.ceil(this.total / this.pagesize),
			page = parseint(input.value);
		if (isnan(page)) page = 1;
		else if (page < 1) page = 1;
		else if (page > totalpage) page = totalpage;
		switch(method) {
			case "first": page = 1; break;
			case "prev": if (page > 1) page--; break;
			case "next": if (page < totalpage) page++; break;
			case "last": page = totalpage; break;
		}
		input.value = page;
		this.page = page; //记录当前页
		if (this.source)
			this.source(page); //调用查询
	}
	//重置
	fn.reset = function (total) {
		this.total = total; //记录总条数
		var ul = this.div.children[0];
		ul.children[0].innerhtml = "共 " + total + " 条记录";
		
		if (!this.allowpage) return;
		var totalpage = math.ceil(total / this.pagesize);
		var li = ul.children[1];
		var first = li.children[0];
		var prev = li.children[1];
		var next = li.children[2];
		var last = li.children[3];
		if (this.page == 1) dom.addclass(first, "disabled");
		else dom.removeclass(first, "disabled");
		if (this.page == 1) dom.addclass(prev, "disabled");
		else dom.removeclass(prev, "disabled");
		if (totalpage == 0 || this.page == totalpage) dom.addclass(next, "disabled");
		else dom.removeclass(next, "disabled");
		if (totalpage == 0 || this.page == totalpage) dom.addclass(last, "disabled");
		else dom.removeclass(last, "disabled");
		ul.children[2].innerhtml = this.pagesize + "条每页";
		ul.children[3].children[1].innerhtml = totalpage + "页";
	}
})();

//上传
(function(){
	window.uploader = function(input) {
		init.call(this, input);
	}
	var fn = uploader.prototype;
	function init(input) {
		if (typeof(input) == "string")
			input = dom.get(input);
		this.input = input;
		var progressbar = this.progressbar = dom.create("<span style='color:green;display:none'>上传中...</span>");
		dom.insertafter(input, progressbar);
	}
	//上传
	fn.upload = function(callback, args) {
		var me = this;
		if (this.input.value == "") return;
		this.progressbar.style.display = "inline"; //开进度条
		this.progressbar.innerhtml = "上传中...";
		this.progressbar.style.color = "orange";
		this.tempinput = this.input.clonenode(true);
		this.input.parentnode.insertbefore(this.tempinput, this.input);
		var iframe_id = dom.createid("iframe_upload_");
		var iframe = this.iframe = document.body.appendchild(dom.create("<iframe id='" + iframe_id + "' name='" + iframe_id + "' style='display:none'>"));
		if (iframe.attachevent)
			iframe.attachevent('onload', function() { iframeload.call(me, callback, args); });
		else iframe.onload = function() { iframeload.call(me, callback, args); };
		var form = this.form = document.body.appendchild(dom.create("<form action='/pages/message/upload.ashx' target='" + iframe.id + "' method='post' enctype='multipart/form-data' encoding='multipart/form-data' style='position:absolute;top:-999px'/>"));
		form.appendchild(this.input);
		form.submit();
	}
	//完成上传
	function iframeload(callback, args) {
		var msg = this.iframe.contentdocument.body.innertext;
		dom.remove(this.iframe);
		dom.remove(this.form);
		this.tempinput.parentnode.insertbefore(this.input, this.tempinput);
		dom.remove(this.tempinput);
		if (msg.split("\n").length == 1) {
			this.progressbar.innerhtml = "上传成功";
			this.progressbar.style.color = "green";
			if (callback) callback(true, args, msg);
		}
		else {
			this.progressbar.innerhtml = "上传失败";
			this.progressbar.style.color = "red";
			alert(msg);
			if (callback) callback(false, args, msg);
			return;
		}
	}
})();