$(document).ready(function() {
	//options( 1 - ON , 0 - OFF)
	var auto_slide = 1;
		var hover_pause = 1;
	var key_slide = 1;
	
	//speed of auto slide(
	var auto_slide_seconds = 5000;
	/* IMPORTANT: i know the variable is called ...seconds but it's 
	in milliseconds ( multiplied with 1000) '*/
	
	/*move he last list item before the first item. The purpose of this is 
	if the user clicks to slide left he will be able to see the last item.*/
	$('#carousel_ul li:first').before($('#carousel_ul li:last')); 
	
	//check if auto sliding is enabled
	if(auto_slide == 1){
		/*set the interval (loop) to call function slide with option 'right' 
		and set the interval time to the variable we declared previously */
		var timer = setInterval('slide("right")', auto_slide_seconds); 
		
		/*and change the value of our hidden field that hold info about
		the interval, setting it to the number of milliseconds we declared previously*/
		$('#hidden_auto_slide_seconds').val(auto_slide_seconds);
	}

	//check if hover pause is enabled
	if(hover_pause == 1){
		//when hovered over the list 
		$('#carousel_ul').hover(function(){
			//stop the interval
			clearInterval(timer)
		},function(){
			//and when mouseout start it again
			timer = setInterval('slide("right")', auto_slide_seconds); 
		});

	}

	//check if key sliding is enabled
	if(key_slide == 1){
		
		//binding keypress function
		$(document).bind('keypress', function(e) {
			//keyCode for left arrow is 37 and for right it's 39 '
			if(e.keyCode==37){
					//initialize the slide to left function
					slide('left');
			}else if(e.keyCode==39){
					//initialize the slide to right function
					slide('right');
			}
		});

	}	
});
	
//FUNCTIONS BELLOW

//slide function  
function slide(where){

		//get the item width
		var item_width = $('#carousel_ul li').outerWidth() + 0;  // A LA BASE 10)
		
		/* using a if statement and the where variable check 
		we will check where the user wants to slide (left or right)*/
		if(where == 'left'){
			//...calculating the new left indent of the unordered list (ul) for left sliding
			var left_indent = parseInt($('#carousel_ul').css('left')) + item_width;
		}else{
			//...calculating the new left indent of the unordered list (ul) for right sliding
			var left_indent = parseInt($('#carousel_ul').css('left')) - item_width;
		
		}
		
		
		//make the sliding effect using jQuery's animate function... '
		$('#carousel_ul:not(:animated)').animate({'left' : left_indent},500,function(){    
			
			/* when the animation finishes use the if statement again, and make an ilussion
			of infinity by changing place of last or first item*/
			if(where == 'left'){
				//...and if it slided to left we put the last item before the first item
				$('#carousel_ul li:first').before($('#carousel_ul li:last'));
			}else{
				//...and if it slided to right we put the first item after the last item
				$('#carousel_ul li:last').after($('#carousel_ul li:first')); 
			}
			
			//...and then just get back the default left indent
			$('#carousel_ul').css({'left' : '-641px'}); // A LA BASE -210px
		});
}