var Scroller = function(p){

	this.currPos   = p.currPos   ? p.currPos   : 0 ;
	this.increment = p.increment ? p.increment : 1 ;
	this.maxScroll = p.maxScroll ? p.maxScroll : 200 ;
	this.refresh   = p.refresh   ? p.refresh   : 60 ;

	this.elem      = p.elem ? p.elem : null ;
	this.elem = document.getElementById(this.elem);
	
	this.timer   = null;
	this.status  = "stop";
	this.canPlay = true;
	
	var self = this ;
	
	this.play  = function()
	{
		if( this.elem && this.canPlay )
		{
			this.status = "run" ;
			this.currPos += this.increment ;
			
			// Reset curr position to loop scrolling
			if( this.currPos > this.maxScroll )  
				this.currPos = 0;
				
			// Scroll the element
			this.elem.scrollTop = this.currPos;
			this.timer = window.setTimeout( function(){ self.play() } , this.refresh  );
		}
	}
	
	this.stop = function()
	{
		//this.canPlay = false;
		clearTimeout( this.timer );
		this.status = "stop" ;
	}

}

var s1 = null ;
var s2 = null ;
var s3 = null ;
var s4 = null ;
function init()
{
	s1 = new Scroller({ maxScroll : 550 , elem : "banner_expocasa_text" }) ;
	s2 = new Scroller({ maxScroll : 200 , elem : "banner3_text" }) ;
	s3 = new Scroller({ maxScroll : 200 , elem : "banner5_text" }) ;
	s4 = new Scroller({ maxScroll : 200 , elem : "banner6_text" }) ;
	
	s1.play();
	s2.play();
	s3.play();
	s4.play();
	
}



function stopAnim(s)
{
	if( s.status=="run" )
		s.stop();
}
function playAnim(s)
{
	if( s.status=="stop" )
		s.play();
}

/*var currPos   = 0   ;
var increment = 1   ; 



var maxScroll = 550 ;
var refresh   = 60  ;

var timer     = null   ;
var status    = "stop" ;
var canPlay   = false  ;

function init()
{
	var s1 = new Scroller({ maxScroll : 550 , elem : "banner_expocasa_text" })
	s1.play();
	
	var s2 = new Scroller({ maxScroll : 200 , elem : "banner3_text" })
	s2.play();
	
}

function bannerScroller(  elem   )
{
	if( canPlay )
	{
		status = "run" ;
		currPos += increment ;
		
		// Reset curr position to loop scrolling
		if( currPos > maxScroll )  
			currPos = 0;
		
		// Scroll the element
		elem.scrollTop = currPos;
		timer = window.setTimeout( function(){ bannerScroller( elem ) } , refresh  )
	
	
	}
}

function stopAnimation()
{
	canPlay = false;
	clearTimeout( timer );
	status = "stop" ;
}
function playAnimation()
{
	if(canPlay==false)
	{
		canPlay = true;
		var elem = document.getElementById("banner_expocasa_text") ;
		bannerScroller( elem ) ;
	}
}
*/