var tempo;
var speed_scroll = 50;
var andar;
var obj_scroll;
var diferenca = 0;		

function scroll(dir){
	obj_scroll = document.getElementById("conteudo");
	
	switch(dir){
		case 'desce':
			obj_scroll.scrollTop = obj_scroll.scrollTop + 10;
		break;
		
		case 'sobe':
			obj_scroll.scrollTop = obj_scroll.scrollTop - 10;
		break;
	}
}
		
function timer(op){
	if(op == 'desce'){
		tempo = setInterval("scroll('desce')", speed_scroll);
	} else if(op == 'sobe'){
		tempo = setInterval("scroll('sobe')", speed_scroll);				
	}
}
		
function limparTimer(){
	window.clearInterval(tempo);
}

function pop(url,nome,param){
	janela = window.open(url,nome,param);
}