;(function ($) {


	$.fn.dhpageing = function (option) {
		var defaultmenus = {showitemnum:10,theme:'#2c73ac'},
			contentbox,
			pagingbox,
			allitem,
			allpagenum,
			currentpage = 1,
			home,
			end,
			prev,
			next,
			skip,
			btn,
			pagingallnumbox,
			inputvalue

		if (typeof option === 'object' && !(option instanceof array)) {
			defaultmenus.showitemnum = option.showitemnum || 10
			defaultmenus.theme = option.theme || '#2c73ac'
		}

		contentbox = this


		var initpaging = function (self) {
			var pagingstr = '<div class="paging clearfix" id="paging"> ' +
				'<a class="fl paging_btn paging_home">首页</a> ' +
				'<a class="fl paging_btn paging_prev">上一页</a> ' +
				'<a class="fl paging_btn paging_next">下一页</a> ' +
				'<div class="fl switch_num">' +
				'共<span class="paging_all_num">11</span>页 转到第 <input type="text" value="1" class="paging_num">页 ' +
				'</div> <a class="fl paging_btn paging_skip">跳转</a> ' +
				'<a class="fl paging_btn marginr0 paging_end">尾页</a> ' +
				'</div>'
			self.after(pagingstr)

			//获得paging按钮的一系列对象
			pagingbox = self.next()
			allitem = self.find('> *')
			allpagenum = math.ceil(allitem.length / defaultmenus.showitemnum)
			home = pagingbox.find('.paging_home')
			end = pagingbox.find('.paging_end')
			prev = pagingbox.find('.paging_prev')
			next = pagingbox.find('.paging_next')
			skip = pagingbox.find('.paging_skip')
			btn = pagingbox.find('.paging_btn')
			inputvalue = pagingbox.find('.paging_num')
			pagingallnumbox = pagingbox.find('.paging_all_num')

			btn.css('background', defaultmenus.theme)
			pagingallnumbox.html(allpagenum)

			inputvalue.keydown(function (e) {
				if (e.keycode === 13) {
					skiphandle()
				}
			})
		}

		var render = function (self) {
			//主渲染函数

			var _showitemnum = defaultmenus.showitemnum,
				renderitem,
				domfragment = document.createdocumentfragment()

			renderitem = allitem.slice(currentpage * _showitemnum - _showitemnum, currentpage * _showitemnum)
			for (var i = 0; i < renderitem.length; i++) {
				domfragment.appendchild(renderitem[i])
			}
			contentbox.html($(domfragment))
			inputvalue.val(currentpage)
		}

		var btnclick = function (self) {
			//各个按钮点击事件执行函数
			btn.click(function () {
				if (this === home[0]) {
					homehandle()
				} else if (this === end[0]) {
					endhandle()
				} else if (this === prev[0]) {
					prevhandle()
				} else if (this === next[0]) {
					nexthandle()
				} else if (this === skip[0]) {
					skiphandle()
				}
			})
		}


		var homehandle = function () {
				currentpage = 1
				render()
			},
			endhandle = function () {
				currentpage = allpagenum
				render()
			},
			prevhandle = function () {
				currentpage--
				if (currentpage < 1) {
					currentpage = 1
				} else {
					render()
				}
			},
			nexthandle = function () {
				currentpage++
				if (currentpage > allpagenum) {
					currentpage = allpagenum
				} else {
					render()
				}
			},
			skiphandle = function () {
				var _setcurrentpagenum = inputvalue.val()
				if (_setcurrentpagenum > allpagenum) {
					_setcurrentpagenum = allpagenum
				}
				if (_setcurrentpagenum < 1) {
					_setcurrentpagenum = 1
				}

				currentpage = _setcurrentpagenum
				render()
			}

		initpaging(this)
		render(this)
		btnclick(this)
	}
})(jquery);