jQuery.fn.pagination = function(maxentries, opts){
	opts = jQuery.extend({
		sorting: '',
		items_per_page: 5,
		num_display_entries: 0,
		current_page: 0,
		num_edge_entries: 0,
		prev_text: "Prev",
		next_text: "Next",
		prev_show_always: true,
		next_show_always: true,
		ellipse_text: "...",
		anchor:"javascript:;",
		callback: function(){return false;}
	},opts||{});
	return this.each(function() {
		function numPages() {
			return Math.ceil(maxentries/opts.items_per_page);
		}
		function getInterval()  {
			var ne_half = Math.ceil(opts.num_display_entries/2);
			var np = numPages();
			var upper_limit = np-opts.num_display_entries;
			var start = current_page>ne_half?Math.max(Math.min(current_page-ne_half, upper_limit), 0):0;
			var end = current_page>ne_half?Math.min(current_page+ne_half, np):Math.min(opts.num_display_entries, np);
			return [start,end];
		}
		function pageSelected(page_id, evt){
			current_page = page_id;
			drawLinks();
			var continuePropagation = opts.callback(page_id, panel, opts.sorting);
			if (!continuePropagation) {
				if (evt.stopPropagation) {
					evt.stopPropagation();
				}
				else {
					evt.cancelBubble = true;
				}
			}
			return continuePropagation;
		}
		function drawLinks() {
			panel.empty();
			var interval = getInterval();
			var np = numPages();
			var getClickHandler = function(page_id) {
				return function(evt){ return pageSelected(page_id,evt); }
			}
			var appendItem = function(page_id, appendopts) {
				page_id = page_id<0?0:(page_id<np?page_id:np-1);
				appendopts = jQuery.extend({text:page_id+1, classes:""}, appendopts||{});
				if(page_id == current_page) {
					var lnk = jQuery("<span class='current'>"+(appendopts.text)+"</span>");
				}
				else {
					var lnk = jQuery("<a>"+(appendopts.text)+"</a>").bind("click", getClickHandler(page_id)).attr('href', opts.anchor);
				}
				if(appendopts.classes){lnk.addClass(appendopts.classes);}
				panel.append(lnk);
			}
			if(opts.prev_text && (current_page > 0 || opts.prev_show_always)){
				appendItem(current_page-1,{text:opts.prev_text, classes:"prev"});
			}
			if (interval[0] > 0 && opts.num_edge_entries > 0) {
				var end = Math.min(opts.num_edge_entries, interval[0]);
				for(var i=0; i<end; i++) {
					appendItem(i);
				}
				if(opts.num_edge_entries < interval[0] && opts.ellipse_text) {
					jQuery("<span>"+opts.ellipse_text+"</span>").appendTo(panel);
				}
			}
			for(var i=interval[0]; i<interval[1]; i++) {
				appendItem(i);
			}
			if (interval[1] < np && opts.num_edge_entries > 0) {
				if(np-opts.num_edge_entries > interval[1]&& opts.ellipse_text) {
					jQuery("<span>"+opts.ellipse_text+"</span>").appendTo(panel);
				}
				var begin = Math.max(np-opts.num_edge_entries, interval[1]);
				for(var i=begin; i<np; i++) {
					appendItem(i);
				}
				
			}
			if(opts.next_text && (current_page < np-1 || opts.next_show_always)) {
				appendItem(current_page+1,{text:opts.next_text, classes:"next"});
			}
		}
		var current_page = opts.current_page;
		maxentries = (!maxentries || maxentries < 0)?1:maxentries;
		opts.items_per_page = (!opts.items_per_page || opts.items_per_page < 0)?1:opts.items_per_page;
		var panel = jQuery(this);
		this.selectPage = function(page_id){ pageSelected(page_id);}
		this.prevPage = function(){ 
			if (current_page > 0) {
				pageSelected(current_page - 1);
				return true;
			}
			else {
				return false;
			}
		}
		this.nextPage = function(){ 
			if(current_page < numPages()-1) {
				pageSelected(current_page+1);
				return true;
			}
			else {
				return false;
			}
		}
		drawLinks();
        opts.callback(current_page, this, opts.sorting);
	});
}