function page_up(num,speed)
{
 var v_poz;
 var kod;
 
 if (NAV4){
 	v_poz=document.keret.document.szoveg.top;
 }

 if (IE4){
 	v_poz=document.all.keret.document.all.szoveg.style.pixelTop;
 }

 if ((v_poz < num) && (v_poz < 0)){
	dup_layer_poz_rel("keret","szoveg",0,speed);
	kod = "st1=setTimeout(\"page_up("+num+","+speed+");\",1);"
	eval(kod);
 }

 if (v_poz == num){
	dup_layer_poz("keret","szoveg","top",0);
	clearTimeout(st1);
 }	
 
 if ((v_poz <= speed) && (v_poz >= 0)){
	dup_layer_poz("keret","szoveg","top",0);
	clearTimeout(st1);
 }	
}

function page_down(num,speed)
{
 var v_poz;
 var kod;
 
 if (NAV4){
 	v_poz=document.keret.document.szoveg.top;
 }

 if (IE4){
 	v_poz=document.all.keret.document.all.szoveg.style.pixelTop;
 }

 if ((v_poz <= 0) && (v_poz > num)){
	dup_layer_poz_rel("keret","szoveg",0,speed);
	kod = "st1=setTimeout(\"page_down("+num+","+speed+");\",1);"
	eval(kod);
 }
 
/* if (v_poz == num){
	dup_layer_poz_rel("keret","szoveg",0,0);
	clearTimeout(st1);
 }*/

 if (v_poz <= num){
	dup_layer_poz("keret","szoveg","top",num);
	clearTimeout(st1);
 }	
}