window.addEvent('domready', function() {
    
    /* ----------Config Vars----------- */
    var slideTimer = 10000;  //time between slides (1 second = 1000), a.k.a. the interval duration
    var transitionTime = 1250; //transition time (1 second = 1000)
    var items = $$('.slide_item');  //Get array of elements for sliding
    var prevBtn = $('prevbtn');
    var nextBtn = $('nextbtn');
    var itemNum = 0;  //initialize a variable to hold the current slide index
    var isPaused = 0;
    
    /* --------end config vars-------- */
    
    //Setup positions
    items.each(function(element, index) {
        
        //since the viewer obviously has javascript on, we can remove the 'first_item' class
        if(index == 0){
            element.removeClass('first_item');
            element.setStyle('left', "0");
        }
        else{
            element.setStyle('left', "291px");
        }
    
    });
    
    var numItems = items.length;  //get number of slider items
    //end setup
    
    //Slider Stuff
    var slideForward = function(){ 
    
        //get item to slide out
        var curItem = items[itemNum];  
        
        //change index
        if(itemNum < (numItems - 1)){
            itemNum++; 
        }
        else{
            itemNum = 0;
        }
        
        //now get item to slide in using new index
        var newItem = items[itemNum];
        
        
        //set up our animation stylings for out and in motions (note:  Fx.Styles does NOT exist in moo 1.2, so we must use Fx.Morph or Fx.Tween)
        var item_in = new Fx.Morph(newItem, {
                 duration: transitionTime, 
                 transition: Fx.Transitions.Quad.easeInOut, 
                 wait:false
        });
        
        var item_out = new Fx.Morph(curItem, {
                 duration: transitionTime, 
                 transition: Fx.Transitions.Quad.easeInOut, 
                 wait:false
        });
        
        //we will set a beginning value here
        //this is so that it gives the illusion of continuous motion from one direction, even after the first cycle of items
        item_in.start({
        'left': [291, 0]
        });
        
        //no beginning values needed, since we always want to push the old item out to the left
        item_out.start({
        'left': '-291'
        });
        
    };
        
        
    var slideBackward = function(){ 
    
        //get item to slide out
        var curItem = items[itemNum];  
        
        //change index for reverse movement
        if(itemNum > 0){
            itemNum--; 
        }
        else{
            itemNum = (numItems - 1);
        }
        
        //now get item to slide in using new index
        var newItem = items[itemNum];
        
        
        var item_in = new Fx.Morph(newItem, {
                 duration: transitionTime, 
                 transition: Fx.Transitions.Quad.easeInOut, 
                 wait:false
        });
        
        var item_out = new Fx.Morph(curItem, {
                 duration: transitionTime, 
                 transition: Fx.Transitions.Quad.easeInOut, 
                 wait:false
        });
        
        
        //we will set a beginning value here too, but this time to make it come from left to right
        item_in.start({
        'left': [-291, 0]
        });
        
        //no beginning values needed
        item_out.start({
        'left': '291'
        });
        
    };
    //end slideBackward
        
        
    //call the slider function periodically
    var theTimer = slideForward.periodical(slideTimer, this); 
    
    nextBtn.addEvent('click', function(){
        if(isPaused == 0){
            $clear(theTimer);
            theTimer = slideForward.periodical(slideTimer);
        }
        slideForward();
    });
    
    prevBtn.addEvent('click', function(){
        if(isPaused == 0){
            $clear(theTimer);
            theTimer = slideForward.periodical(slideTimer);
        }                     
        slideBackward();
    });   
});