function resizeSlider(slider_id, item_width)
{
	var width = $(slider_id).childElements().length * item_width;
	$(slider_id).style.width = width + 'px';
	$(slider_id).style.left = '0px';
}

destaqueActivo = 1;
destaqueIsSliding = false;

function goLeftDestaque(slider_id, item_width)
{
	if(!destaqueIsSliding)
	{
		destaqueIsSliding = true;
		var width = $(slider_id).style.left;
		width = width.substring(0, width.length-2);
		
		item_width = parseInt(item_width);
		
		if(width < 0)
		{
			new Effect.Move(slider_id, {
			  x: item_width, y: 0, mode: 'relative'
			});
			setTimeout(stopDestaque,1000)
			new Effect.Fade('videotext'+destaqueActivo, { duration: 1.0 });
			destaqueActivo--;
			new Effect.Appear('videotext'+destaqueActivo, { duration: 1.0 });
		}
		setTimeout(stopDestaque,1000);
	}
}


function goRightDestaque(slider_id, item_width)
{
	if(!destaqueIsSliding)
	{
		destaqueIsSliding = true;
		var width = $(slider_id).style.left;
		width = width.substring(0, width.length-2);
		
		total_items = $(slider_id).childElements().length;
		var tempWidth = 1 * item_width - total_items * item_width;
		
		item_width = parseInt(item_width);
		
		if(width > tempWidth)
		{
			new Effect.Move(slider_id, {
			  x: -item_width, y: 0, mode: 'relative'
			});	
			new Effect.Fade('videotext'+destaqueActivo, { duration: 1.0 });
			destaqueActivo++;
			new Effect.Appear('videotext'+destaqueActivo, { duration: 1.0 });
		}
		setTimeout(stopDestaque,1000);
	}
}

function stopDestaque()
{
	destaqueIsSliding = false;	
}

// multimedia slider
mmIsSliding = false;

function goLeftMM(slider_id, item_width, items_to_show, step)
{
    items_to_show = typeof(items_to_show) != 'undefined' ? items_to_show : 2;
    step = typeof(step) != 'undefined' ? step : 1;
    
    if(!mmIsSliding)
    {
        mmIsSliding = true;
        var width = $(slider_id).style.left;
        width = width.substring(0, width.length-2);
        
        item_width = parseInt(item_width);
        if(width < 0)
        {
            new Effect.Move(slider_id, {
              x: item_width*step, y: 0, mode: 'relative'
            });
        }
        setTimeout(stopMM,1000);
    }
}

function goRightMM(slider_id, item_width, items_to_show, step)
{
    items_to_show = typeof(items_to_show) != 'undefined' ? items_to_show : 2;
    step = typeof(step) != 'undefined' ? step : 1;
    
    if(!mmIsSliding)
    {
        mmIsSliding = true;
        var width = $(slider_id).style.left;
        width = width.substring(0, width.length-2);
        
        total_items = $(slider_id).childElements().length;
        var tempWidth = items_to_show * item_width - total_items * item_width;
        
        item_width = parseInt(item_width);
        
        if(width > tempWidth)
        {
            new Effect.Move(slider_id, {
              x: -item_width*step, y: 0, mode: 'relative'
            }); 
        }
        setTimeout(stopMM,1000);
    }
}

function stopMM()
{
	mmIsSliding = false;	
}