/** PAGER PLUGIN **/


	/**
	 * $ is an alias to jQuery object
	 *
	 */
	jQuery.fn.pager = function(clas, options) {
	
	var lang = new Object();

		var lang = {
			pager:{
				prevText: '« anterior',
				nextText: 'siguiente »',
				prevP: 'párrafo anterior',	
				nextP: 'párrafo siguiente',
				gotoP: 'salte al párrafo'
			}
		};
		
		var settings = {		
			navId: 'pagednav',
			navClass: 'pagednav',
			navAttach: 'prepend',
			highlightClass: 'highlight',
			prevText: lang.pager.prevText,
			nextText: lang.pager.nextText,
			linkText: null,
			linkWrap: null,
			height: null
		};
		if(options) $.extend(settings, options);
		
			
		return this.each( function () {
			
			var me = $(this);
			var size;
			var i = 0;		
			var navid = '#'+settings.navId;
			
			function init () {
				size = $(clas, me).not(navid).size();
				if(settings.height == null) {			
					settings.height = getHighest();
				}
				if(size > 1) {
					makeNav();
					show();
					highlight();
				}			
				sizePanel();
				if(settings.linkWrap != null) {
					linkWrap();
				}
			};
			function makeNav () {		
				//var str = '<div id="'+settings.navId+'" class="'+settings.navClass+'">';
				var str = '';
				str += '<ul id="'+settings.navId+'" class="'+settings.navClass+'">';
				str += '<li class="prev"><a href="#" rel="prev" title="'+lang.pager.prevP+'" class="fir">'+settings.prevText+'<span>&nbsp;</span></a></li>';
				for(var i = 0; i < size; i++) {
					var j = i+1;
					str += '<li><a href="#" title="'+lang.pager.gotoP+' '+j+'" rel="'+j+'">';
					str += (settings.linkText == null) ? j : settings.linkText[j-1];				
					str += '</a></li>';
				}
				str += '<li class="next"><a href="#" rel="next" title="'+lang.pager.nextP+'" class="fir">'+settings.nextText+'<span>&nbsp;</span></a></li>';
				str += '</ul>';
				//str += '</div>';
				switch (settings.navAttach) {		
					case 'before':
						$(me).before(str);
						break;
					case 'after':		
						$(me).after(str);
						break;
					case 'prepend':
						$(me).prepend(str);
						break;
					default:
						$(me).append(str);
						break;
				}
			};
			function show () {
				$(me).find(clas).not(navid).hide();
				var show = $(me).find(clas).not(navid).get(i);
				$(show).show();
			};		
			function highlight () {
				$(me).find(navid).find('a').removeClass(settings.highlightClass);
				var show = $(me).find(navid).find('a').get(i+1);			
				$(show).addClass(settings.highlightClass);
			};
	
			function sizePanel () {
				if($.browser.msie) {
					$(me).find(clas).not(navid).css( {
						height: settings.height
					});	
				} else {
					$(me).find(clas).not(navid).css( {
						minHeight: settings.height
					});
				}
			};
			function getHighest () {
				var highest = 0;
				$(me).find(clas).not(navid).each(function () {
					
					if(this.offsetHeight > highest) {
						highest = this.offsetHeight;
					}
				});
				highest = highest + "px";
				return highest;
			};
			function getNavHeight () {
				var nav = $(navid).get(0);
				return nav.offsetHeight;
			};
			function linkWrap () {
				$(me).find(navid).find("a").wrap(settings.linkWrap);
			};
			init();
			$(this).find(navid).find("a").click(function () {
	
				if($(this).attr('rel') == 'next') {
					if(i + 1 < size) {
						i = i+1;
					}
				} else if($(this).attr('rel') == 'prev') { 
					if(i > 0) {	
						i = i-1;
					}
				} else {		
					var j = $(this).attr('rel');	
					i = j-1;		
				}
				show();
				highlight();
				return false;
			});
		});	
	};