function top(){
	window.scroll(0,620);
}
function cima(){
	var scrollX, scrollY;

    if (document.all)
    {
        if (!document.documentElement.scrollLeft)
            scrollX = document.body.scrollLeft;
        else
            scrollX = document.documentElement.scrollLeft;

        if (!document.documentElement.scrollTop)
            scrollY = document.body.scrollTop;
        else
            scrollY = document.documentElement.scrollTop;
    }
    else
    {
        scrollX = window.pageXOffset;
        scrollY = window.pageYOffset;
    }
	scrollY = scrollY - 80;
	window.scroll(0,scrollY);
    //alert("X: " + scrollX + "\nY: " + scrollY);
}
function baixo(){
	var scrollX, scrollY;

    if (document.all)
    {
        if (!document.documentElement.scrollLeft)
            scrollX = document.body.scrollLeft;
        else
            scrollX = document.documentElement.scrollLeft;

        if (!document.documentElement.scrollTop)
            scrollY = document.body.scrollTop;
        else
            scrollY = document.documentElement.scrollTop;
    }
    else
    {
        scrollX = window.pageXOffset;
        scrollY = window.pageYOffset;
    }
	scrollY = scrollY + 80;
	window.scroll(0,scrollY);
    //alert("X: " + scrollX + "\nY: " + scrollY);
}