/**
	 * jCountr
	 * Creates a countdown timer from a jQuery object. 
	 *
	 * $(<selector>).counter({params});
	 *
	 * @author agentor@gmx.de
	 * @version 1.2 [2009-05-06]
	 */
	 
	jQuery.fn.counter = function(params) {
		var self = this;
	
		self.display = $(this);
		self.hour = params.hour?params.hour:"0";
		self.min = params.min?params.min:"0";
		self.sec = params.sec?params.sec:"0";
		self.hour_end = params.hour_end?params.hour_end:"0";
		self.min_end = params.min_end?params.min_end:"0";
		self.sec_end = params.sec_end?params.sec_end:"0";
		self.message = params.message?params.message:"FINISHED";
		self.delimiter = params.delimiter?params.delimiter:":";
		self.return_url = params.return_url?params.return_url:"";
		self.finish_function = params.finish_function?params.finish_function:"";
		self.interval = params.interval?params.interval*1000:"1000";
		self.iteration = params.iteration?params.iteration:"1";
		self.direction = params.direction?params.direction:"down";
		
		self.timestamp = (self.hour * 60 * 60) + (self.min * 60) + (self.sec*1);
		self.timestamp_end = (self.hour_end * 60 * 60) + (self.min_end * 60) + (self.sec_end*1);
	            
	    self.onTick = params.onTick?params.onTick:function() { return true; };
	    self.onFinish = params.onFinish?params.onFinish:function() { return true; };
	
	
		/** update the countdown while running **/
		self._updateCounter = function(params) {
			self.change_hour = params.change_hour?params.change_hour:"0";
			self.change_min = params.change_min?params.change_min:"0";
			self.change_sec = params.change_sec?params.change_sec:"0";
			self.change_direction = params.change_direction?params.change_direction:"up";
			self.hour = params.hour?params.hour:self.hour;
			self.min = params.min?params.min:self.min;
			self.sec = params.sec?params.sec:self.sec;
			self.hour_end = params.hour_end?params.hour_end:self.hour_end;
			self.min_end = params.min_end?params.min_end:self.min_end;
			self.sec_end = params.sec_end?params.sec_end:self.sec_end;
			self.message = params.message?params.message:self.message;
			self.delimiter = params.delimiter?params.delimiter:self.delimiter;
			self.return_url = params.return_url?params.return_url:self.return_url;
			self.finish_function = params.finish_function?params.finish_function:self.finish_function;
			self.interval = params.interval?params.interval*1000:self.interval;
			self.iteration = params.iteration?params.iteration:self.iteration;
			self.direction = params.direction?params.direction:self.direction;
	
			self.timestamp_end = (self.hour_end * 60 * 60) + (self.min_end * 60) + (self.sec_end*1);
			
			/** if we want to change the current countdown, there a two ways **/
			if(self.change_hour != 0 || self.change_min != 0 || self.change_sec != 0) {
				
				/** first, we can change the countdown with an specific time **/
				var temp_timestamp = self._createTimestamp(self.change_hour,self.change_min,self.change_sec);
				if(self.change_direction.match(/up/)) {
					self.timestamp += temp_timestamp;
				} else if(self.change_direction.match(/down/)) {
					self.timestamp -= temp_timestamp;
				} else {
					return;
				}
			} else {
				
				/** or we change the countdown to a specific time **/
				self.timestamp = (self.hour * 60 * 60) + (self.min * 60) + (self.sec*1);
			}
			return;
			
		};
		
		
		self._createTimestamp = function(hour,min,sec) {
			return (hour * 60 * 60) + (min * 60) + (sec*1)
		}
	
		/** get a counter from an timestamp **/
		self._getCounterFromTimestamp = function(t) {
			if (t > 0) {
				hours = Math.floor(t / 3600)
				minutes = Math.floor( (t / 3600 - hours) * 60)
		    	seconds = Math.round( ( ( (t / 3600 - hours) * 60) - minutes) * 60)
		    } else {
		        hours = 0;
		        minutes = 0;
		        seconds = 0;
		    }
		    
		    if (seconds == 60)  {
		    	seconds = 0;
		    }
		    
		    if(seconds == 0)  {
		    	if(hours != 0) 	{
		    		minutes = minutes/1 + 1;
		    	}
		    }
		    
		    if (minutes < 10)  {
		    	if (minutes < 0) {
		    		minutes = 0;
		    	}
			    minutes = '0' + minutes;
		    }
		    if (seconds < 10) {
		    	if (seconds < 0) {
		    		seconds = 0;
		    	}
		    	seconds = '0' + seconds;
		    }
		    
		    if (hours < 10) {
		    	if (hours < 0) {
		    		hours = 0;
		    	}
		    	hours = '0' + hours;
		    }
			
			if(hours > 0) {
			    return hours + self.delimiter + minutes + self.delimiter + seconds;
			} else {
				return minutes + self.delimiter + seconds;
			}
		};
	       
	    /** update the text for the countdown timer **/
	    self._tick = function() {
	
	    	if(self.timestamp > 0 && self.timestamp != self.timestamp_end) {
		    	var counter = self._getCounterFromTimestamp(self.timestamp);
		    	
		    	/** show the current time **/
		        self.display.html(counter);
		        
		        if(self.direction == "down") {
			        self.timestamp = self.timestamp*1 - self.iteration*1;
		        } else if(self.direction == "up") {
		        	self.timestamp = self.timestamp*1 + self.iteration*1;
		        } else {
		        	return;
		        }
	    	} else {
	    		window.clearInterval(self._interval);
	            if (!self.onFinish(self.display)) { 
	            	return;
	            }
	            
	            /** display the finish message **/
	            self.display.html(self.message);
	            
	            /** if there is a function to call, call it **/
	            if(self.finish_function != "") {
	            	eval(self.finish_function);
	            }
	            
	            /** if there is a return url, go there **/
	            if(self.return_url != "") {
		            window.location.href = self.return_url;
	            }
	            return;
	    	}
	    };
	    
	    
	    /** do it **/
	    self._tick();
	    self._interval = window.setInterval(
	        self._tick,
	        self.interval
	        );
	
	    return this;
	};