timerID = null;
timerIDd = null;

var active = 0;
var actived = 0;
  
function ScrollUp(speed){
    	if(document.getElementById){
    		if(parseInt(obj[active].style.top) < 0){
    			obj[active].style.top = parseInt(obj[active].style.top) + speed + "px";
		}
    		timerID = setTimeout("ScrollUp("+speed+")",30);
    	}
}

function ScrollDown(speed){
    	if(document.getElementById){                        
    		if(parseInt(obj[active].style.top) > document.getElementById('cont').offsetHeight - obj[active].offsetHeight){ 
    			obj[active].style.top = parseInt(obj[active].style.top) - speed + "px";
		}
    		timerID = setTimeout("ScrollDown("+speed+")",30);
    	}
}

function ScrollStop(){
    	if(document.getElementById){
    		clearTimeout(timerID);
    	}
}

//pojazdy demo scrooooool me
function ScrollDemoUp(speed){
    	if(document.getElementById){
    		if(parseInt(objd[actived].style.top) < 0){
    			objd[actived].style.top = parseInt(objd[actived].style.top) + speed + "px";
		}
    		timerIDd = setTimeout("ScrollDemoUp("+speed+")",30);
    	}
}

function ScrollDemoDown(speed){
    	if(document.getElementById){                        
    		if(parseInt(objd[actived].style.top) > document.getElementById('cont_demo').offsetHeight - objd[actived].offsetHeight){ 
    			objd[actived].style.top = parseInt(objd[actived].style.top) - speed + "px";
		}
    		timerIDd = setTimeout("ScrollDemoDown("+speed+")",30);
    	}
}

function ScrollDemoStop(){
    	if(document.getElementById){
    		clearTimeout(timerIDd);
    	}
}

function ScrollPageInit() {
    	if(document.getElementById){
    		obj = document.getElementById("cont").getElementsByTagName("div");
    		obj['nasi1'].style.visibility = "visible";
    		obj['nasi1'].style.top = 0;

			objd = document.getElementById("cont_demo").getElementsByTagName("div");
			objd['demo2'].style.visibility = "visible";
    		objd['demo2'].style.top = 0;	
    	}	
	
}