timerID = null;
var active = 0;

function ChangePage(num){
    	if(document.getElementById){
    		obj[active].style.visibility = "hidden";
    		active = num;
    		obj[active].style.top = 0;
    		obj[active].style.visibility = "visible";
    	}
}
    
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);
    	}
}

function ScrollPageInit() {
    	if(document.getElementById){
    		obj = document.getElementById("cont").getElementsByTagName("div");
    		obj['page1'].style.visibility = "visible";
    		obj['page1'].style.top = 0;	
    	}	
    	if(document.addEventListener){
    		for(i=0;i<document.getElementsByTagName('a').length;i++){
    			document.getElementsByTagName('a')[i].style.position = "relative";
		}
    	}
}